| Aaronsohnia Warb. & Eig | | a | | Aaronsohnia Warb. & Eig | | Asteraceae |
| Abrotanella Cass. | | a | | Abrotanella Cass. | | Asteraceae |
| Absinthium Mill. | Artemisia L. | | | Absinthium Mill. | Artemisia L. | Asteraceae |
| Acamptopappus (A. Gray) A. Gray | | a | | Acamptopappus (A. Gray) A. Gray | | Asteraceae |
| Acanthocephalus Kar. & Kir. | | a | | Acanthocephalus Kar. & Kir. | | Asteraceae |
| Acanthocladium F. Muell. | | a | | Acanthocladium F. Muell. | | Asteraceae |
| Acanthodesmos C. D. Adams & duQuesnay | | a | | Acanthodesmos C. D. Adams & duQuesnay | | Asteraceae |
| Acantholepis Less. | Echinops L. | | | Acantholepis Less. | Echinops L. | Asteraceae |
| Acanthospermum Schrank | | a | | Acanthospermum Schrank | | Asteraceae |
| Acanthostyles R. M. King & H. Rob. | | a | | Acanthostyles R. M. King & H. Rob. | | Asteraceae |
| Acarna Boehm. | Atractylis L. | | | Acarna Boehm. | Atractylis L. | Asteraceae |
| Acilepidopsis H. Rob. | | a | | Acilepidopsis H. Rob. | | Asteraceae |
| Acilepis D. Don | | a | | Acilepis D. Don | | Asteraceae |
| Acmella Rich. | | a | | Acmella Rich. | | Asteraceae |
| Acomis F. Muell. | | a | | Acomis F. Muell. | | Asteraceae |
| Acosta Adans. | Centaurea L. | | | Acosta Adans. | Centaurea L. | Asteraceae |
| Acourtia D. Don | | a | | Acourtia D. Don | | Asteraceae |
| Acrisione B. Nord. | | a | | Acrisione B. Nord. | | Asteraceae |
| Acritopappus R. M. King & H. Rob. | | a | | Acritopappus R. M. King & H. Rob. | | Asteraceae |
| Acroclinium A. Gray | Rhodanthe Lindl. | | | Acroclinium A. Gray | Rhodanthe Lindl. | Asteraceae |
| Acroptilon Cass. | Rhaponticum Ludw. | | | Acroptilon Cass. | Rhaponticum Ludw. | Asteraceae |
| Actinea Juss. | Helenium L. | | | Actinea Juss. | Helenium L. | Asteraceae |
| Actinella Pers. | Helenium L. | | | Actinella Pers. | Helenium L. | Asteraceae |
| Actinobole Endl. | | a | | Actinobole Endl. | | Asteraceae |
| Actinomeris Nutt. | Verbesina L. | | | Actinomeris Nutt. | Verbesina L. | Asteraceae |
| Actinoseris (Endl.) Cabrera | Richterago Kuntze | | | Actinoseris (Endl.) Cabrera | Richterago Kuntze | Asteraceae |
| Actinospermum Elliott | Balduina Nutt. | | | Actinospermum Elliott | Balduina Nutt. | Asteraceae |
| Actites Lander | | a | | Actites Lander | | Asteraceae |
| Adelostigma Steetz | | a | | Adelostigma Steetz | | Asteraceae |
| Adenachaena DC. | Phymaspermum Less. | | | Adenachaena DC. | Phymaspermum Less. | Asteraceae |
| Adenanthellum B. Nord. | | a | | Adenanthellum B. Nord. | | Asteraceae |
| Adenanthemum B. Nord. | Adenanthellum B. Nord. | | | Adenanthemum B. Nord. | Adenanthellum B. Nord. | Asteraceae |
| Adenocaulon Hook. | | a | | Adenocaulon Hook. | | Asteraceae |
| Adenocritonia R. M. King & H. Rob. | | a | | Adenocritonia R. M. King & H. Rob. | | Asteraceae |
| Adenoglossa B. Nord. | | a | | Adenoglossa B. Nord. | | Asteraceae |
| Adenoon Dalzell | | a | | Adenoon Dalzell | | Asteraceae |
| Adenopappus Benth. | Tagetes L. | | | Adenopappus Benth. | Tagetes L. | Asteraceae |
| Adenophyllum Pers. | | a | | Adenophyllum Pers. | | Asteraceae |
| Adenostemma J. R. Forst. & G. Forst. | | a | | Adenostemma J. R. Forst. & G. Forst. | | Asteraceae |
| Adenostyles Cass. | | a | | Adenostyles Cass. | | Asteraceae |
| Adenothamnus D. D. Keck | | a | | Adenothamnus D. D. Keck | | Asteraceae |
| Adventina Raf. | Galinsoga Ruiz & Pav. | | | Adventina Raf. | Galinsoga Ruiz & Pav. | Asteraceae |
| Aedesia O. Hoffm. | | a | | Aedesia O. Hoffm. | | Asteraceae |
| Aegopordon Boiss. | Jurinea Cass. | | | Aegopordon Boiss. | Jurinea Cass. | Asteraceae |
| Aequatorium B. Nord. | | a | | Aequatorium B. Nord. | | Asteraceae |
| Aetheolaena Cass. | Senecio L. | | | Aetheolaena Cass. | Senecio L. | Asteraceae |
| Aetheopappus Cass. | Psephellus Cass. | | | Aetheopappus Cass. | Psephellus Cass. | Asteraceae |
| Aetheorhiza Cass. | | a | | Aetheorhiza Cass. | | Asteraceae |
| Afroaster J. C. Manning & Goldblatt | | a | | Afroaster J. C. Manning & Goldblatt | | Asteraceae |
| Agassizia A. Gray & Engelm. | Gaillardia Foug. | | | Agassizia A. Gray & Engelm. | Gaillardia Foug. | Asteraceae |
| Agathaea Cass. | Felicia Cass. | | | Agathaea Cass. | Felicia Cass. | Asteraceae |
| Ageratella A. Gray ex S. Watson | | a | | Ageratella A. Gray ex S. Watson | | Asteraceae |
| Ageratina Spach | | a | | Ageratina Spach | | Asteraceae |
| Ageratinastrum Mattf. | | a | | Ageratinastrum Mattf. | | Asteraceae |
| Ageratum L. | | a | | Ageratum L. | | Asteraceae |
| Agiabampoa Rose ex O. Hoffm. | Alvordia Brandegee | | | Agiabampoa Rose ex O. Hoffm. | Alvordia Brandegee | Asteraceae |
| Agnorhiza (Jeps.) W. A. Weber | | a | | Agnorhiza (Jeps.) W. A. Weber | | Asteraceae |
| Agoseris Raf. | | a | | Agoseris Raf. | | Asteraceae |
| Agrianthus Mart. ex DC. | | a | | Agrianthus Mart. ex DC. | | Asteraceae |
| Achaenipodium Brandegee | Verbesina L. | | | Achaenipodium Brandegee | Verbesina L. | Asteraceae |
| Achaetogeron A. Gray | Erigeron L. | | | Achaetogeron A. Gray | Erigeron L. | Asteraceae |
| Achillea L. | | a | | Achillea L. | | Asteraceae |
| Achnophora F. Muell. | | a | | Achnophora F. Muell. | | Asteraceae |
| Achnopogon Maguire et al. | | a | | Achnopogon Maguire et al. | | Asteraceae |
| Achyrachaena Schauer | | a | | Achyrachaena Schauer | | Asteraceae |
| Achyranthemum N. G. Bergh | | a | | Achyranthemum N. G. Bergh | | Asteraceae |
| Achyranthemum N. G. Bergh | | a | | Achyranthemum N. G. Bergh | | Asteraceae |
| Achyrobaccharis Sch. Bip. ex Walp. | Baccharis L. | | | Achyrobaccharis Sch. Bip. ex Walp. | Baccharis L. | Asteraceae |
| Achyrocline (Less.) DC. | | a | | Achyrocline (Less.) DC. | | Asteraceae |
| Achyrocoma (Cass.) Cass. | Vernonia Schreb. | | | Achyrocoma (Cass.) Cass. | Vernonia Schreb. | Asteraceae |
| Achyropappus Kunth | | a | | Achyropappus Kunth | | Asteraceae |
| Achyrophorus Adans. | Hypochaeris L. | | | Achyrophorus Adans. | Hypochaeris L. | Asteraceae |
| Achyrothalamus O. Hoffm. | Erythrocephalum Benth. | | | Achyrothalamus O. Hoffm. | Erythrocephalum Benth. | Asteraceae |
| Ainsliaea DC. | | a | | Ainsliaea DC. | | Asteraceae |
| Aiolotheca DC. | Zaluzania Pers. | | | Aiolotheca DC. | Zaluzania Pers. | Asteraceae |
| Ajania Poljakov | Chrysanthemum L. | | | Ajania Poljakov | Chrysanthemum L. | Asteraceae |
| Ajaniopsis C. Shih | | a | | Ajaniopsis C. Shih | | Asteraceae |
| Akeassia Lebrun & Stork | | a | | Akeassia Lebrun & Stork | | Asteraceae |
| Alarconia DC. | Wyethia Nutt. | | | Alarconia DC. | Wyethia Nutt. | Asteraceae |
| Alatoseta Compton | | a | | Alatoseta Compton | | Asteraceae |
| Albertinia Spreng. | | a | | Albertinia Spreng. | | Asteraceae |
| Alcantara Glaz. ex G. M. Barroso | Xerxes J. R. Grant | | | Alcantara Glaz. ex G. M. Barroso | Xerxes J. R. Grant | Asteraceae |
| Alcina Cav. | Melampodium L. | | | Alcina Cav. | Melampodium L. | Asteraceae |
| Alciope DC. | Capelio B. Nord. | | | Alciope DC. | Capelio B. Nord. | Asteraceae |
| Aldama La Llave | | a | | Aldama La Llave | | Asteraceae |
| Alepidocline S. F. Blake | | a | | Alepidocline S. F. Blake | | Asteraceae |
| Alfredia Cass. | | a | | Alfredia Cass. | | Asteraceae |
| Aliella Qaiser & Lack | | a | | Aliella Qaiser & Lack | | Asteraceae |
| Allagopappus Cass. | | a | | Allagopappus Cass. | | Asteraceae |
| Allardia Decne. | | a | | Allardia Decne. | | Asteraceae |
| Allittia P. S. Short | | a | | Allittia P. S. Short | | Asteraceae |
| Allocephalus Bringel et al. | | a | | Allocephalus Bringel et al. | | Asteraceae |
| Alloispermum Willd. | | a | | Alloispermum Willd. | | Asteraceae |
| Allopterigeron Dunlop | | a | | Allopterigeron Dunlop | | Asteraceae |
| Almutaster Á. Löve & D. Löve | | a | | Almutaster Á. Löve & D. Löve | | Asteraceae |
| Alomia Kunth | | a | | Alomia Kunth | | Asteraceae |
| Alomiella R. M. King & H. Rob. | | a | | Alomiella R. M. King & H. Rob. | | Asteraceae |
| Alvordia Brandegee | | a | | Alvordia Brandegee | | Asteraceae |
| Amauria Benth. | | a | | Amauria Benth. | | Asteraceae |
| Amauriopsis Rydb. | | a | | Amauriopsis Rydb. | | Asteraceae |
| Ambassa Steetz | | a | | Ambassa Steetz | | Asteraceae |
| Amberboa (Pers.) Less. | | a | | Amberboa (Pers.) Less. | | Asteraceae |
| Amblyocarpum Fisch. & C. A. Mey. | | a | | Amblyocarpum Fisch. & C. A. Mey. | | Asteraceae |
| Amblyolepis DC. | | a | | Amblyolepis DC. | | Asteraceae |
| Amblyopappus Hook. & Arn. | | a | | Amblyopappus Hook. & Arn. | | Asteraceae |
| Amblysperma Benth. | Trichocline Cass. | | | Amblysperma Benth. | Trichocline Cass. | Asteraceae |
| Amboroa Cabrera | | a | | Amboroa Cabrera | | Asteraceae |
| Ambrosia L. | | a | | Ambrosia L. | | Asteraceae |
| Ameghinoa Speg. | | a | | Ameghinoa Speg. | | Asteraceae |
| Amellus L. | | a | | Amellus L. | | Asteraceae |
| Ammobium R. Br. ex Sims | | a | | Ammobium R. Br. ex Sims | | Asteraceae |
| Ammocyanus (Boiss.) Dostál | Centaurea L. | | | Ammocyanus (Boiss.) Dostál | Centaurea L. | Asteraceae |
| Ammodia Nutt. | Heterotheca Cass. | | | Ammodia Nutt. | Heterotheca Cass. | Asteraceae |
| Amolinia R. M. King & H. Rob. | | a | | Amolinia R. M. King & H. Rob. | | Asteraceae |
| Ampelaster G. L. Nesom | | a | | Ampelaster G. L. Nesom | | Asteraceae |
| Ampherephis Kunth | Centratherum Cass. | | | Ampherephis Kunth | Centratherum Cass. | Asteraceae |
| Amphiachyris (A. DC.) Nutt. | | a | | Amphiachyris (A. DC.) Nutt. | | Asteraceae |
| Amphidoxa DC. | Gnaphalium L. | | | Amphidoxa DC. | Gnaphalium L. | Asteraceae |
| Amphiglossa DC. | | a | | Amphiglossa DC. | | Asteraceae |
| Amphipappus Torr. & A. Gray | | a | | Amphipappus Torr. & A. Gray | | Asteraceae |
| Amphirhapis DC. | Aster L. | | | Amphirhapis DC. | Aster L. | Asteraceae |
| Amphoricarpos Vis. | | a | | Amphoricarpos Vis. | | Asteraceae |
| Anacantha (Iljin) Soják | | a | | Anacantha (Iljin) Soják | | Asteraceae |
| Anacyclus L. | | a | | Anacyclus L. | | Asteraceae |
| Anandria Less. | Leibnitzia Cass. | | | Anandria Less. | Leibnitzia Cass. | Asteraceae |
| Ananthura H. Rob. & Skvarla | | a | | Ananthura H. Rob. & Skvarla | | Asteraceae |
| Anaphalioides (Benth.) Kirp. | | a | | Anaphalioides (Benth.) Kirp. | | Asteraceae |
| Anaphalis DC. | | a | | Anaphalis DC. | | Asteraceae |
| Anastraphia D. Don | Gochnatia Kunth | | | Anastraphia D. Don | Gochnatia Kunth | Asteraceae |
| Anaxeton Gaertn. | | a | | Anaxeton Gaertn. | | Asteraceae |
| Ancathia DC. | | a | | Ancathia DC. | | Asteraceae |
| Ancistrocarphus A. Gray | | a | | Ancistrocarphus A. Gray | | Asteraceae |
| Ancistrophora A. Gray | Verbesina L. | | | Ancistrophora A. Gray | Verbesina L. | Asteraceae |
| Andryala L. | | a | | Andryala L. | | Asteraceae |
| Anemocarpa Paul G. Wilson | | a | | Anemocarpa Paul G. Wilson | | Asteraceae |
| Angelianthus H. Rob. & Brettell | Microliabum Cabrera | | | Angelianthus H. Rob. & Brettell | Microliabum Cabrera | Asteraceae |
| Angelphytum G. M. Barroso | | a | | Angelphytum G. M. Barroso | | Asteraceae |
| Angianthus J. C. Wendl. | | a | | Angianthus J. C. Wendl. | | Asteraceae |
| Anisocarpus Nutt. | | a | | Anisocarpus Nutt. | | Asteraceae |
| Anisocoma Torr. & A. Gray | | a | | Anisocoma Torr. & A. Gray | | Asteraceae |
| Anisochaeta DC. | | a | | Anisochaeta DC. | | Asteraceae |
| Anisopappus Hook. & Arn. | | a | | Anisopappus Hook. & Arn. | | Asteraceae |
| Anisothrix O. Hoffm. | | a | | Anisothrix O. Hoffm. | | Asteraceae |
| Anomostephium DC. | Wedelia Jacq. | | | Anomostephium DC. | Wedelia Jacq. | Asteraceae |
| Antennaria Gaertn. | | a | | Antennaria Gaertn. | | Asteraceae |
| Anteremanthus H. Rob. | | a | | Anteremanthus H. Rob. | | Asteraceae |
| Anthemis L. | | a | | Anthemis L. | | Asteraceae |
| Antheropeas Rydb. | Eriophyllum Lag. | | | Antheropeas Rydb. | Eriophyllum Lag. | Asteraceae |
| Anticona Linares-Perea et al. | | a | | Anticona Linares-Perea et al. | | Asteraceae |
| Antillanthus B. Nord. | | a | | Antillanthus B. Nord. | | Asteraceae |
| Antillia R. M. King & H. Rob. | | a | | Antillia R. M. King & H. Rob. | | Asteraceae |
| Antiphiona Merxm. | | a | | Antiphiona Merxm. | | Asteraceae |
| Antithrixia DC. | | a | | Antithrixia DC. | | Asteraceae |
| Anura (Juz.) Tscherneva | Cousinia Cass. | | | Anura (Juz.) Tscherneva | Cousinia Cass. | Asteraceae |
| Anvillea DC. | | a | | Anvillea DC. | | Asteraceae |
| Anvilleina Maire | Anvillea DC. | | | Anvilleina Maire | Anvillea DC. | Asteraceae |
| Apalochlamys Cass. | | a | | Apalochlamys Cass. | | Asteraceae |
| Apargia Scop. | Leontodon L. | | | Apargia Scop. | Leontodon L. | Asteraceae |
| Apargidium Torr. & A. Gray | Microseris D. Don | | | Apargidium Torr. & A. Gray | Microseris D. Don | Asteraceae |
| Aphanactis Wedd. | | a | | Aphanactis Wedd. | | Asteraceae |
| Aphanostephus DC. | Erigeron L. | | | Aphanostephus DC. | Erigeron L. | Asteraceae |
| Aphantochaeta A. Gray | Chaetopappa DC. | | | Aphantochaeta A. Gray | Chaetopappa DC. | Asteraceae |
| Aphyllocladus Wedd. | | a | | Aphyllocladus Wedd. | | Asteraceae |
| Aplotaxis DC. | Saussurea DC. | | | Aplotaxis DC. | Saussurea DC. | Asteraceae |
| Apodocephala Baker | | a | | Apodocephala Baker | | Asteraceae |
| Apopyros G. L. Nesom | Erigeron L. | | | Apopyros G. L. Nesom | Erigeron L. | Asteraceae |
| Aposeris Neck. ex Cass. | | a | | Aposeris Neck. ex Cass. | | Asteraceae |
| Apostates Lander | | a | | Apostates Lander | | Asteraceae |
| Arbelaezaster Cuatrec. | | a | | Arbelaezaster Cuatrec. | | Asteraceae |
| Arctanthemum (Tzvelev) Tzvelev | Chrysanthemum L. | | | Arctanthemum (Tzvelev) Tzvelev | Chrysanthemum L. | Asteraceae |
| Arctium L. | | a | | Arctium L. | | Asteraceae |
| Arctogeron DC. | | a | | Arctogeron DC. | | Asteraceae |
| Arctotheca J. C. Wendl. | | a | | Arctotheca J. C. Wendl. | | Asteraceae |
| Arctotis L. | | a | | Arctotis L. | | Asteraceae |
| Arcyna Wiklund | Cynara L. | | | Arcyna Wiklund | Cynara L. | Asteraceae |
| Argentipallium Paul G. Wilson | | a | | Argentipallium Paul G. Wilson | | Asteraceae |
| Argyranthemum Webb ex Sch. Bip. | | a | | Argyranthemum Webb ex Sch. Bip. | | Asteraceae |
| Argyroglottis Turcz. | | a | | Argyroglottis Turcz. | | Asteraceae |
| Argyrophanes Schltdl. | Chrysocephalum Walp. | | | Argyrophanes Schltdl. | Chrysocephalum Walp. | Asteraceae |
| Argyrotegium J. M. Ward & Breitw. | | a | | Argyrotegium J. M. Ward & Breitw. | | Asteraceae |
| Argyrovernonia MacLeish | Chresta Vell. ex DC. | | | Argyrovernonia MacLeish | Chresta Vell. ex DC. | Asteraceae |
| Argyroxiphium DC. | | a | | Argyroxiphium DC. | | Asteraceae |
| Archanthemis Lo Presti & Oberpr. | | a | | Archanthemis Lo Presti & Oberpr. | | Asteraceae |
| Archibaccharis Heering | | a | | Archibaccharis Heering | | Asteraceae |
| Archidasyphyllum (Cabrera) P. L. Ferreira et al. | | a | | Archidasyphyllum (Cabrera) P. L. Ferreira et al. | | Asteraceae |
| Archidasyphyllum (Cabrera) P. L. Ferreira et al. | | a | | Archidasyphyllum (Cabrera) P. L. Ferreira et al. | | Asteraceae |
| Archiserratula L. Martins | | a | | Archiserratula L. Martins | | Asteraceae |
| Arida (R. L. Hartm.) D. R. Morgan & R. L. Hartm. | | a | | Arida (R. L. Hartm.) D. R. Morgan & R. L. Hartm. | | Asteraceae |
| Aristeguietia R. M. King & H. Rob. | | a | | Aristeguietia R. M. King & H. Rob. | | Asteraceae |
| Arnaldoa Cabrera | | a | | Arnaldoa Cabrera | | Asteraceae |
| Arnica L. | | a | | Arnica L. | | Asteraceae |
| Arnicastrum Greenm. | | a | | Arnicastrum Greenm. | | Asteraceae |
| Arnoglossum Raf. | | a | | Arnoglossum Raf. | | Asteraceae |
| Arnoseris Gaertn. | | a | | Arnoseris Gaertn. | | Asteraceae |
| Arrhenechthites Mattf. | | a | | Arrhenechthites Mattf. | | Asteraceae |
| Arrojadocharis Mattf. | | a | | Arrojadocharis Mattf. | | Asteraceae |
| Arrowsmithia DC. | | a | | Arrowsmithia DC. | | Asteraceae |
| Artemisia L. | | a | | Artemisia L. | | Asteraceae |
| Artemisiella Ghafoor | | a | | Artemisiella Ghafoor | | Asteraceae |
| Artemisiopsis S. Moore | | a | | Artemisiopsis S. Moore | | Asteraceae |
| Asaemia (Harv.) Benth. | | a | | Asaemia (Harv.) Benth. | | Asteraceae |
| Asanthus R. M. King & H. Rob. | Steviopsis R. M. King & H. Rob. | | | Asanthus R. M. King & H. Rob. | Steviopsis R. M. King & H. Rob. | Asteraceae |
| Ascidiogyne Cuatrec. | | a | | Ascidiogyne Cuatrec. | | Asteraceae |
| Aschenbornia S. Schauer | Calea L. | | | Aschenbornia S. Schauer | Calea L. | Asteraceae |
| Askellia W. A. Weber | | a | | Askellia W. A. Weber | | Asteraceae |
| Aspilia Thouars | | a | | Aspilia Thouars | | Asteraceae |
| Aspiliopsis Greenm. | Podachaenium Benth. ex Oerst. | | | Aspiliopsis Greenm. | Podachaenium Benth. ex Oerst. | Asteraceae |
| Asplundianthus R. M. King & H. Rob. | Eupatorium L. | | | Asplundianthus R. M. King & H. Rob. | Eupatorium L. | Asteraceae |
| Astemma Less. | Monactis Kunth | | | Astemma Less. | Monactis Kunth | Asteraceae |
| Aster L. | | a | | Aster L. | | Asteraceae |
| Asteridea Lindl. | | a | | Asteridea Lindl. | | Asteraceae |
| Asteriscus Mill. | | a | | Asteriscus Mill. | | Asteraceae |
| Asteromoea Blume | Aster L. | | | Asteromoea Blume | Aster L. | Asteraceae |
| Asteropsis Less. | | a | | Asteropsis Less. | | Asteraceae |
| Asterothamnus Novopokr. | | a | | Asterothamnus Novopokr. | | Asteraceae |
| Astranthium Nutt. | | a | | Astranthium Nutt. | | Asteraceae |
| Athanasia L. | | a | | Athanasia L. | | Asteraceae |
| Athrixia Ker Gawl. | | a | | Athrixia Ker Gawl. | | Asteraceae |
| Athroisma DC. | | a | | Athroisma DC. | | Asteraceae |
| Atractylis L. | | a | | Atractylis L. | | Asteraceae |
| Atractylodes DC. | | a | | Atractylodes DC. | | Asteraceae |
| Atrichantha Hilliard & B. L. Burtt | | a | | Atrichantha Hilliard & B. L. Burtt | | Asteraceae |
| Atrichoseris A. Gray | | a | | Atrichoseris A. Gray | | Asteraceae |
| Aucklandia Falc. | | a | | Aucklandia Falc. | | Asteraceae |
| Austrobrickellia R. M. King & H. Rob. | | a | | Austrobrickellia R. M. King & H. Rob. | | Asteraceae |
| Austrocritonia R. M. King & H. Rob. | | a | | Austrocritonia R. M. King & H. Rob. | | Asteraceae |
| Austroeupatorium R. M. King & H. Rob. | | a | | Austroeupatorium R. M. King & H. Rob. | | Asteraceae |
| Austroliabum H. Rob. & Brettell | Microliabum Cabrera | | | Austroliabum H. Rob. & Brettell | Microliabum Cabrera | Asteraceae |
| Austrosynotis C. Jeffrey | | a | | Austrosynotis C. Jeffrey | | Asteraceae |
| Autrania C. Winkl. & Barbey | Myopordon Boiss. | | | Autrania C. Winkl. & Barbey | Myopordon Boiss. | Asteraceae |
| Avellara Blanca & C. Díaz | Scorzonera L. | | | Avellara Blanca & C. Díaz | Scorzonera L. | Asteraceae |
| Axiniphyllum Benth. | | a | | Axiniphyllum Benth. | | Asteraceae |
| Ayapana Spach | | a | | Ayapana Spach | | Asteraceae |
| Ayapanopsis R. M. King & H. Rob. | | a | | Ayapanopsis R. M. King & H. Rob. | | Asteraceae |
| Aylacophora Cabrera | | a | | Aylacophora Cabrera | | Asteraceae |
| Aynia H. Rob. | | a | | Aynia H. Rob. | | Asteraceae |
| Aztecaster G. L. Nesom | | a | | Aztecaster G. L. Nesom | | Asteraceae |
| Babcockia Boulos | Sonchus L. | | | Babcockia Boulos | Sonchus L. | Asteraceae |
| Baccharidastrum Cabrera | Baccharis L. | | | Baccharidastrum Cabrera | Baccharis L. | Asteraceae |
| Baccharidiopsis G. M. Barroso | Aster L. | | | Baccharidiopsis G. M. Barroso | Aster L. | Asteraceae |
| Baccharis L. | | a | | Baccharis L. | | Asteraceae |
| Baccharoides Moench | | a | | Baccharoides Moench | | Asteraceae |
| Badilloa R. M. King & H. Rob. | | a | | Badilloa R. M. King & H. Rob. | | Asteraceae |
| Baeria Fisch. & C. A. Mey. | Lasthenia Cass. | | | Baeria Fisch. & C. A. Mey. | Lasthenia Cass. | Asteraceae |
| Baeriopsis J. T. Howell | | a | | Baeriopsis J. T. Howell | | Asteraceae |
| Bafutia C. D. Adams | | a | | Bafutia C. D. Adams | | Asteraceae |
| Bahia Lag. | | a | | Bahia Lag. | | Asteraceae |
| Bahianthus R. M. King & H. Rob. | | a | | Bahianthus R. M. King & H. Rob. | | Asteraceae |
| Bahiopsis Kellogg | | a | | Bahiopsis Kellogg | | Asteraceae |
| Baileya Harv. & A. Gray ex Torr. | | a | | Baileya Harv. & A. Gray ex Torr. | | Asteraceae |
| Baillieria Aubl. | Clibadium F. Allam. ex L. | | | Baillieria Aubl. | Clibadium F. Allam. ex L. | Asteraceae |
| Bajacalia Loockerman et al. | | a | | Bajacalia Loockerman et al. | | Asteraceae |
| Balduina Nutt. | | a | | Balduina Nutt. | | Asteraceae |
| Balsamita Mill. | Tanacetum L. | | | Balsamita Mill. | Tanacetum L. | Asteraceae |
| Balsamorhiza Nutt. | | a | | Balsamorhiza Nutt. | | Asteraceae |
| Baltimora L. | | a | | Baltimora L. | | Asteraceae |
| Barkhausia Moench | Crepis L. | | | Barkhausia Moench | Crepis L. | Asteraceae |
| Barkleyanthus H. Rob. & Brettell | | a | | Barkleyanthus H. Rob. & Brettell | | Asteraceae |
| Barnadesia Mutis ex L. f. | | a | | Barnadesia Mutis ex L. f. | | Asteraceae |
| Barrattia A. Gray & Engelm. | Simsia Pers. | | | Barrattia A. Gray & Engelm. | Simsia Pers. | Asteraceae |
| Barroetea A. Gray | Brickellia Elliott | | | Barroetea A. Gray | Brickellia Elliott | Asteraceae |
| Barrosoa R. M. King & H. Rob. | | a | | Barrosoa R. M. King & H. Rob. | | Asteraceae |
| Bartlettia A. Gray | | a | | Bartlettia A. Gray | | Asteraceae |
| Bartlettina R. M. King & H. Rob. | | a | | Bartlettina R. M. King & H. Rob. | | Asteraceae |
| Basedowia E. Pritz. | | a | | Basedowia E. Pritz. | | Asteraceae |
| Batopilasia G. L. Nesom & Noyes | | a | | Batopilasia G. L. Nesom & Noyes | | Asteraceae |
| Bebbia Greene | | a | | Bebbia Greene | | Asteraceae |
| Bedfordia DC. | | a | | Bedfordia DC. | | Asteraceae |
| Bechium DC. | | a | | Bechium DC. | | Asteraceae |
| Bejaranoa R. M. King & H. Rob. | | a | | Bejaranoa R. M. King & H. Rob. | | Asteraceae |
| Bellida Ewart | | a | | Bellida Ewart | | Asteraceae |
| Bellidastrum Scop., orth. var. | Bellidiastrum Scop. | | | Bellidastrum Scop., orth. var. | Bellidiastrum Scop. | Asteraceae |
| Bellidiastrum Scop. | | a | | Bellidiastrum Scop. | | Asteraceae |
| Bellis L. | | a | | Bellis L. | | Asteraceae |
| Bellium L. | | a | | Bellium L. | | Asteraceae |
| Belloa J. Rémy | | a | | Belloa J. Rémy | | Asteraceae |
| Benitoa D. D. Keck | Lessingia Cham. | | | Benitoa D. D. Keck | Lessingia Cham. | Asteraceae |
| Berardia Vill. | | a | | Berardia Vill. | | Asteraceae |
| Berkheya Ehrh. | | a | | Berkheya Ehrh. | | Asteraceae |
| Berlandiera DC. | | a | | Berlandiera DC. | | Asteraceae |
| Berroa Beauverd | | a | | Berroa Beauverd | | Asteraceae |
| Berylsimpsonia B. L. Turner | | a | | Berylsimpsonia B. L. Turner | | Asteraceae |
| Bethencourtia Choisy | | a | | Bethencourtia Choisy | | Asteraceae |
| Bidens L. | | a | | Bidens L. | | Asteraceae |
| Bigelowia DC. | | a | | Bigelowia DC. | | Asteraceae |
| Billya Cass. | Petalacte D. Don | | | Billya Cass. | Petalacte D. Don | Asteraceae |
| Biotia DC. | Eurybia (Cass.) Cass. | | | Biotia DC. | Eurybia (Cass.) Cass. | Asteraceae |
| Bipontia S. F. Blake | Soaresia Sch. Bip. | | | Bipontia S. F. Blake | Soaresia Sch. Bip. | Asteraceae |
| Bishopalea H. Rob. | | a | | Bishopalea H. Rob. | | Asteraceae |
| Bishopanthus H. Rob. | | a | | Bishopanthus H. Rob. | | Asteraceae |
| Bishopiella R. M. King & H. Rob. | | a | | Bishopiella R. M. King & H. Rob. | | Asteraceae |
| Bishovia R. M. King & H. Rob. | | a | | Bishovia R. M. King & H. Rob. | | Asteraceae |
| Blainvillea Cass. | | a | | Blainvillea Cass. | | Asteraceae |
| Blakeanthus R. M. King & H. Rob. | | a | | Blakeanthus R. M. King & H. Rob. | | Asteraceae |
| Blakiella Cuatrec. | | a | | Blakiella Cuatrec. | | Asteraceae |
| Blanchetia DC. | | a | | Blanchetia DC. | | Asteraceae |
| Blennosperma Less. | | a | | Blennosperma Less. | | Asteraceae |
| Blennospora A. Gray | | a | | Blennospora A. Gray | | Asteraceae |
| Blepharipappus Hook. | | a | | Blepharipappus Hook. | | Asteraceae |
| Blepharispermum DC. | | a | | Blepharispermum DC. | | Asteraceae |
| Blepharizonia (A. Gray) Greene | | a | | Blepharizonia (A. Gray) Greene | | Asteraceae |
| Blumea DC. | | a | | Blumea DC. | | Asteraceae |
| Blumeopsis Gagnep. | | a | | Blumeopsis Gagnep. | | Asteraceae |
| Boebera Willd. | Dyssodia Cav. | | | Boebera Willd. | Dyssodia Cav. | Asteraceae |
| Boeberastrum (A. Gray) Rydb. | | a | | Boeberastrum (A. Gray) Rydb. | | Asteraceae |
| Boeberoides (DC.) Strother | | a | | Boeberoides (DC.) Strother | | Asteraceae |
| Bojeria DC. | Inula L. | | | Bojeria DC. | Inula L. | Asteraceae |
| Bolandia Cron | | a | | Bolandia Cron | | Asteraceae |
| Bolanosa A. Gray | | a | | Bolanosa A. Gray | | Asteraceae |
| Bolocephalus Hand.-Mazz. | | a | | Bolocephalus Hand.-Mazz. | | Asteraceae |
| Bolophyta Nutt. | Parthenium L. | | | Bolophyta Nutt. | Parthenium L. | Asteraceae |
| Boltonia LʼHér. | | a | | Boltonia LʼHér. | | Asteraceae |
| Bombycilaena (DC.) Smoljan. | | a | | Bombycilaena (DC.) Smoljan. | | Asteraceae |
| Borkonstia Ignatov | Aster L. | | | Borkonstia Ignatov | Aster L. | Asteraceae |
| Borrichia Adans. | | a | | Borrichia Adans. | | Asteraceae |
| Bothriocline Oliv. ex Benth. | | a | | Bothriocline Oliv. ex Benth. | | Asteraceae |
| Bourdonia Greene | Chaetopappa DC. | | | Bourdonia Greene | Chaetopappa DC. | Asteraceae |
| Bracteantha Anderb. & Haegi | Xerochrysum Tzvelev | | | Bracteantha Anderb. & Haegi | Xerochrysum Tzvelev | Asteraceae |
| Bradburia Torr. & A. Gray | Chrysopsis (Nutt.) Elliott | | | Bradburia Torr. & A. Gray | Chrysopsis (Nutt.) Elliott | Asteraceae |
| Brachanthemum DC. | | a | | Brachanthemum DC. | | Asteraceae |
| Brachionostylum Mattf. | | a | | Brachionostylum Mattf. | | Asteraceae |
| Brachyactis Ledeb. | | a | | Brachyactis Ledeb. | | Asteraceae |
| Brachyandra Phil. | Helogyne Nutt. | | | Brachyandra Phil. | Helogyne Nutt. | Asteraceae |
| Brachyclados Gillies ex D. Don | | a | | Brachyclados Gillies ex D. Don | | Asteraceae |
| Brachycome Cass., orth. var. | Brachyscome Cass. | | | Brachycome Cass., orth. var. | Brachyscome Cass. | Asteraceae |
| Brachyglottis J. R. Forst. & G. Forst. | | a | | Brachyglottis J. R. Forst. & G. Forst. | | Asteraceae |
| Brachychaeta Torr. & A. Gray | Solidago L. | | | Brachychaeta Torr. & A. Gray | Solidago L. | Asteraceae |
| Brachylaena R. Br. | | a | | Brachylaena R. Br. | | Asteraceae |
| Brachymeris DC. | Phymaspermum Less. | | | Brachymeris DC. | Phymaspermum Less. | Asteraceae |
| Brachyonostylum Mattf., orth. var. | Brachionostylum Mattf. | | | Brachyonostylum Mattf., orth. var. | Brachionostylum Mattf. | Asteraceae |
| Brachyris Nutt. | Gutierrezia Lag. | | | Brachyris Nutt. | Gutierrezia Lag. | Asteraceae |
| Brachyscome Cass. | | a | | Brachyscome Cass. | | Asteraceae |
| Brachythrix Wild & G. V. Pope | | a | | Brachythrix Wild & G. V. Pope | | Asteraceae |
| Brasilia G. M. Barroso | Calea L. | | | Brasilia G. M. Barroso | Calea L. | Asteraceae |
| Brauneria Neck. ex Porter & Britton | Echinacea Moench | | | Brauneria Neck. ex Porter & Britton | Echinacea Moench | Asteraceae |
| Breea Less. | Cirsium Mill. | | | Breea Less. | Cirsium Mill. | Asteraceae |
| Brenandendron H. Rob. | | a | | Brenandendron H. Rob. | | Asteraceae |
| Brickellia Elliott | | a | | Brickellia Elliott | | Asteraceae |
| Brickelliastrum R. M. King & H. Rob. | | a | | Brickelliastrum R. M. King & H. Rob. | | Asteraceae |
| Brintonia Greene | | a | | Brintonia Greene | | Asteraceae |
| Brocchia Vis. | | a | | Brocchia Vis. | | Asteraceae |
| Brotera Willd. | Cardopatium Juss. | | | Brotera Willd. | Cardopatium Juss. | Asteraceae |
| Broteroa Kuntze, orth. var. | Cardopatium Juss. | | | Broteroa Kuntze, orth. var. | Cardopatium Juss. | Asteraceae |
| Bryomorphe Harv. | | a | | Bryomorphe Harv. | | Asteraceae |
| Bubonium Hill | Asteriscus Mill. | | | Bubonium Hill | Asteriscus Mill. | Asteraceae |
| Bulbostylis DC. | Coleostephus Cass. | | | Bulbostylis DC. | Coleostephus Cass. | Asteraceae |
| Buphthalmum L. | | a | | Buphthalmum L. | | Asteraceae |
| Burkartia Crisci | | a | | Burkartia Crisci | | Asteraceae |
| Burrielia DC. | Lasthenia Cass. | | | Burrielia DC. | Lasthenia Cass. | Asteraceae |
| Caatinganthus H. Rob. | | a | | Caatinganthus H. Rob. | | Asteraceae |
| Cabobanthus H. Rob. | | a | | Cabobanthus H. Rob. | | Asteraceae |
| Cabreraea Bonifacino | | a | | Cabreraea Bonifacino | | Asteraceae |
| Cabreriella Cuatrec. | | a | | Cabreriella Cuatrec. | | Asteraceae |
| Cacalia L. | Adenostyles Cass. | | | Cacalia L. | Adenostyles Cass. | Asteraceae |
| Cacaliopsis A. Gray | | a | | Cacaliopsis A. Gray | | Asteraceae |
| Cacosmia Kunth | | a | | Cacosmia Kunth | | Asteraceae |
| Cadiscus E. Mey. ex DC. | Senecio L. | | | Cadiscus E. Mey. ex DC. | Senecio L. | Asteraceae |
| Caesulia Roxb. | | a | | Caesulia Roxb. | | Asteraceae |
| Calais DC. | Microseris D. Don | | | Calais DC. | Microseris D. Don | Asteraceae |
| Calanticaria E. E. Schill. & Panero | | a | | Calanticaria E. E. Schill. & Panero | | Asteraceae |
| Calea L. | | a | | Calea L. | | Asteraceae |
| Calendula L. | | a | | Calendula L. | | Asteraceae |
| Caleopsis Fedde | Goldmanella Greenm. | | | Caleopsis Fedde | Goldmanella Greenm. | Asteraceae |
| Calimeris Nees, orth. var. | Aster L. | | | Calimeris Nees, orth. var. | Aster L. | Asteraceae |
| Calliachyris Torr. & A. Gray | Layia Hook. & Arn. ex DC. | | | Calliachyris Torr. & A. Gray | Layia Hook. & Arn. ex DC. | Asteraceae |
| Callicephalus C. A. Mey. | | a | | Callicephalus C. A. Mey. | | Asteraceae |
| Callichroa Fisch. & C. A. Mey. | Layia Hook. & Arn. ex DC. | | | Callichroa Fisch. & C. A. Mey. | Layia Hook. & Arn. ex DC. | Asteraceae |
| Callilepis DC. | | a | | Callilepis DC. | | Asteraceae |
| Calliopsis Rchb. | Coreopsis L. | | | Calliopsis Rchb. | Coreopsis L. | Asteraceae |
| Callistemma Cass. | Callistephus Cass. | | | Callistemma Cass. | Callistephus Cass. | Asteraceae |
| Callistephus Cass. | | a | | Callistephus Cass. | | Asteraceae |
| Calocephalus R. Br. | | a | | Calocephalus R. Br. | | Asteraceae |
| Calomeria Vent. | | a | | Calomeria Vent. | | Asteraceae |
| Calopappus Meyen | | a | | Calopappus Meyen | | Asteraceae |
| Calorezia Panero | Perezia Lag. | | | Calorezia Panero | Perezia Lag. | Asteraceae |
| Calostephane Benth. | | a | | Calostephane Benth. | | Asteraceae |
| Calotesta P. O. Karis | | a | | Calotesta P. O. Karis | | Asteraceae |
| Calotis R. Br. | | a | | Calotis R. Br. | | Asteraceae |
| Calycadenia DC. | | a | | Calycadenia DC. | | Asteraceae |
| Calycocorsus F. W. Schmidt | Willemetia Neck. | | | Calycocorsus F. W. Schmidt | Willemetia Neck. | Asteraceae |
| Calycoseris A. Gray | | a | | Calycoseris A. Gray | | Asteraceae |
| Calymmandra Torr. & A. Gray | Diaperia Nutt. | | | Calymmandra Torr. & A. Gray | Diaperia Nutt. | Asteraceae |
| Calyptocarpus Less. | | a | | Calyptocarpus Less. | | Asteraceae |
| Camchaya Gagnep. | | a | | Camchaya Gagnep. | | Asteraceae |
| Campovassouria R. M. King & H. Rob. | | a | | Campovassouria R. M. King & H. Rob. | | Asteraceae |
| Camptacra N. T. Burb. | | a | | Camptacra N. T. Burb. | | Asteraceae |
| Campuloclinium DC. | | a | | Campuloclinium DC. | | Asteraceae |
| Campylotheca Cass. | Bidens L. | | | Campylotheca Cass. | Bidens L. | Asteraceae |
| Canadanthus G. L. Nesom | | a | | Canadanthus G. L. Nesom | | Asteraceae |
| Canariothamnus B. Nord. | Bethencourtia Choisy | | | Canariothamnus B. Nord. | Bethencourtia Choisy | Asteraceae |
| Cancrinia Kar. & Kir. | | a | | Cancrinia Kar. & Kir. | | Asteraceae |
| Cancriniella Tzvelev | | a | | Cancriniella Tzvelev | | Asteraceae |
| Capelio B. Nord. | | a | | Capelio B. Nord. | | Asteraceae |
| Caputia B. Nord. & Pelser | | a | | Caputia B. Nord. & Pelser | | Asteraceae |
| Cardonaea Aristeg. et al. | Gongylolepis R. H. Schomb. | | | Cardonaea Aristeg. et al. | Gongylolepis R. H. Schomb. | Asteraceae |
| Cardopatium Juss. | | a | | Cardopatium Juss. | | Asteraceae |
| Carduncellus Adans. | | a | | Carduncellus Adans. | | Asteraceae |
| Carduus L. | | a | | Carduus L. | | Asteraceae |
| Carelia Less. | Radlkoferotoma Kuntze | | | Carelia Less. | Radlkoferotoma Kuntze | Asteraceae |
| Carelia Juss. ex Cav. | Mikania Willd. | | | Carelia Juss. ex Cav. | Mikania Willd. | Asteraceae |
| Carlina L. | | a | | Carlina L. | | Asteraceae |
| Carlquistia B. G. Baldwin | | a | | Carlquistia B. G. Baldwin | | Asteraceae |
| Carminatia Moc. ex DC. | | a | | Carminatia Moc. ex DC. | | Asteraceae |
| Carpesium L. | | a | | Carpesium L. | | Asteraceae |
| Carphephorus Cass. | | a | | Carphephorus Cass. | | Asteraceae |
| Carphochaete A. Gray | | a | | Carphochaete A. Gray | | Asteraceae |
| Carramboa Cuatrec. | | a | | Carramboa Cuatrec. | | Asteraceae |
| Carterothamnus R. M. King | Hofmeisteria Walp. | | | Carterothamnus R. M. King | Hofmeisteria Walp. | Asteraceae |
| Carthamus L. | | a | | Carthamus L. | | Asteraceae |
| Carthamus L. sect. Atractylis | | a | i | Carthamus L. sect. Atractylis | | Asteraceae |
| Carthamus L. sect. Carthamus | | a | i | Carthamus L. sect. Carthamus | | Asteraceae |
| Cassinia R. Br. | | a | | Cassinia R. Br. | | Asteraceae |
| Castalis Cass. | Dimorphotheca Moench | | | Castalis Cass. | Dimorphotheca Moench | Asteraceae |
| Castanedia R. M. King & H. Rob. | | a | | Castanedia R. M. King & H. Rob. | | Asteraceae |
| Castenedia R. M. King & H. Rob., orth. var. | Castanedia R. M. King & H. Rob. | | | Castenedia R. M. King & H. Rob., orth. var. | Castanedia R. M. King & H. Rob. | Asteraceae |
| Castrilanthemum Vogt & Oberpr. | | a | | Castrilanthemum Vogt & Oberpr. | | Asteraceae |
| Castroviejoa Galbany et al. | | a | | Castroviejoa Galbany et al. | | Asteraceae |
| Catamixis Thomson | | a | | Catamixis Thomson | | Asteraceae |
| Catananche L. | | a | | Catananche L. | | Asteraceae |
| Catatia Humbert | | a | | Catatia Humbert | | Asteraceae |
| Catolesia D. J. N. Hind | | a | | Catolesia D. J. N. Hind | | Asteraceae |
| Caucasalia B. Nord. | | a | | Caucasalia B. Nord. | | Asteraceae |
| Cavalcantia R. M. King & H. Rob. | | a | | Cavalcantia R. M. King & H. Rob. | | Asteraceae |
| Cavea W. W. Sm. & Small | | a | | Cavea W. W. Sm. & Small | | Asteraceae |
| Caxamarca M. O. Dillon & Sagást. | | a | | Caxamarca M. O. Dillon & Sagást. | | Asteraceae |
| Celmisia Cass. | | a | | Celmisia Cass. | | Asteraceae |
| Centaurea L. | | a | | Centaurea L. | | Asteraceae |
| Centaurodendron Johow | | a | | Centaurodendron Johow | | Asteraceae |
| Centauropsis Bojer ex DC. | | a | | Centauropsis Bojer ex DC. | | Asteraceae |
| Centaurothamnus Wagenitz & Dittrich | | a | | Centaurothamnus Wagenitz & Dittrich | | Asteraceae |
| Centipeda Lour. | | a | | Centipeda Lour. | | Asteraceae |
| Centrapalus Cass. | | a | | Centrapalus Cass. | | Asteraceae |
| Centratherum Cass. | | a | | Centratherum Cass. | | Asteraceae |
| Centrocarpha D. Don | Rudbeckia L. | | | Centrocarpha D. Don | Rudbeckia L. | Asteraceae |
| Centromadia Greene | | a | | Centromadia Greene | | Asteraceae |
| Centropappus Hook. f. | | a | | Centropappus Hook. f. | | Asteraceae |
| Centrospermum Kunth | Acanthospermum Schrank | | | Centrospermum Kunth | Acanthospermum Schrank | Asteraceae |
| Cephalipterum A. Gray | | a | | Cephalipterum A. Gray | | Asteraceae |
| Cephalobembix Rydb. | Schkuhria Roth | | | Cephalobembix Rydb. | Schkuhria Roth | Asteraceae |
| Cephalonoplos (Neck. ex DC.) Fourr. | Cirsium Mill. | | | Cephalonoplos (Neck. ex DC.) Fourr. | Cirsium Mill. | Asteraceae |
| Cephalopappus Nees & Mart. | | a | | Cephalopappus Nees & Mart. | | Asteraceae |
| Cephalophora Cav. | Helenium L. | | | Cephalophora Cav. | Helenium L. | Asteraceae |
| Cephalorhyncus Boiss., orth. var. | Cephalorrhynchus Boiss. | | | Cephalorhyncus Boiss., orth. var. | Cephalorrhynchus Boiss. | Asteraceae |
| Cephalorrhynchus Boiss. | | a | | Cephalorrhynchus Boiss. | | Asteraceae |
| Cephalosorus A. Gray | | a | | Cephalosorus A. Gray | | Asteraceae |
| Ceratogyne Turcz. | | a | | Ceratogyne Turcz. | | Asteraceae |
| Ceruana Forssk. | | a | | Ceruana Forssk. | | Asteraceae |
| Cicerbita Wallr. | | a | | Cicerbita Wallr. | | Asteraceae |
| Ciceronia Urb. | | a | | Ciceronia Urb. | | Asteraceae |
| Cichorium L. | | a | | Cichorium L. | | Asteraceae |
| Cineraria L. | | a | | Cineraria L. | | Asteraceae |
| Cirsium Mill. | | a | | Cirsium Mill. | | Asteraceae |
| Cissampelopsis (DC.) Miq. | | a | | Cissampelopsis (DC.) Miq. | | Asteraceae |
| Cladanthus Cass. | | a | | Cladanthus Cass. | | Asteraceae |
| Cladochaeta DC. | | a | | Cladochaeta DC. | | Asteraceae |
| Clappia A. Gray | | a | | Clappia A. Gray | | Asteraceae |
| Clavigera DC. | Brickellia Elliott | | | Clavigera DC. | Brickellia Elliott | Asteraceae |
| Cleistanthium Kuntze | Gerbera L. | | | Cleistanthium Kuntze | Gerbera L. | Asteraceae |
| Clibadium F. Allam. ex L. | | a | | Clibadium F. Allam. ex L. | | Asteraceae |
| Cloiselia S. Moore | | a | | Cloiselia S. Moore | | Asteraceae |
| Clybatis Phil. | Leucheria Lag. | | | Clybatis Phil. | Leucheria Lag. | Asteraceae |
| Cnicothamnus Griseb. | | a | | Cnicothamnus Griseb. | | Asteraceae |
| Cnicus L. | Centaurea L. | | | Cnicus L. | Centaurea L. | Asteraceae |
| Codonocephalum Fenzl | Inula L. | | | Codonocephalum Fenzl | Inula L. | Asteraceae |
| Coelestina Cass. | Ageratum L. | | | Coelestina Cass. | Ageratum L. | Asteraceae |
| Coespeletia Cuatrec. | | a | | Coespeletia Cuatrec. | | Asteraceae |
| Coinogyne Less. | Jaumea Pers. | | | Coinogyne Less. | Jaumea Pers. | Asteraceae |
| Coleocoma F. Muell. | | a | | Coleocoma F. Muell. | | Asteraceae |
| Coleosanthus Cass. | Brickellia Elliott | | | Coleosanthus Cass. | Brickellia Elliott | Asteraceae |
| Coleostephus Cass. | | a | | Coleostephus Cass. | | Asteraceae |
| Colobanthera Humbert | | a | | Colobanthera Humbert | | Asteraceae |
| Colobogyne Gagnep. | Acmella Rich. | | | Colobogyne Gagnep. | Acmella Rich. | Asteraceae |
| Cololobus H. Rob. | | a | | Cololobus H. Rob. | | Asteraceae |
| Columbiadoria G. L. Nesom | | a | | Columbiadoria G. L. Nesom | | Asteraceae |
| Comaclinium Scheidw. & Planch. | | a | | Comaclinium Scheidw. & Planch. | | Asteraceae |
| Comborhiza Anderb. & K. Bremer | | a | | Comborhiza Anderb. & K. Bremer | | Asteraceae |
| Commidendrum Burch. ex DC. | | a | | Commidendrum Burch. ex DC. | | Asteraceae |
| Complaya Strother | Sphagneticola O. Hoffm. | | | Complaya Strother | Sphagneticola O. Hoffm. | Asteraceae |
| Comptonanthus B. Nord. | Ifloga Cass. | | | Comptonanthus B. Nord. | Ifloga Cass. | Asteraceae |
| Condylidium R. M. King & H. Rob. | | a | | Condylidium R. M. King & H. Rob. | | Asteraceae |
| Condylopodium R. M. King & H. Rob. | | a | | Condylopodium R. M. King & H. Rob. | | Asteraceae |
| Conocliniopsis R. M. King & H. Rob. | | a | | Conocliniopsis R. M. King & H. Rob. | | Asteraceae |
| Conoclinium DC. | | a | | Conoclinium DC. | | Asteraceae |
| Constancea B. G. Baldwin | | a | | Constancea B. G. Baldwin | | Asteraceae |
| Conyza Less. | Erigeron L. | | | Conyza Less. | Erigeron L. | Asteraceae |
| Conyzanthus Tamamsch. | Aster L. | | | Conyzanthus Tamamsch. | Aster L. | Asteraceae |
| Coreocarpus Benth. | | a | | Coreocarpus Benth. | | Asteraceae |
| Coreopsis L. | | a | | Coreopsis L. | | Asteraceae |
| Coreopsis L. sect. Anathysana | | a | i | Coreopsis L. sect. Anathysana | | Asteraceae |
| Coreopsis L. sect. Calliopsis | | a | i | Coreopsis L. sect. Calliopsis | | Asteraceae |
| Coreopsis L. sect. Coreopsis | | a | i | Coreopsis L. sect. Coreopsis | | Asteraceae |
| Coreopsis L. sect. Electra | | a | i | Coreopsis L. sect. Electra | | Asteraceae |
| Coreopsis L. sect. Eublepharis | | a | i | Coreopsis L. sect. Eublepharis | | Asteraceae |
| Coreopsis L. sect. Gyrophyllum | | a | i | Coreopsis L. sect. Gyrophyllum | | Asteraceae |
| Coreopsis L. sect. Leptosyne | | a | i | Coreopsis L. sect. Leptosyne | | Asteraceae |
| Coreopsis L. sect. Pseudoagarista | | a | i | Coreopsis L. sect. Pseudoagarista | | Asteraceae |
| Coreopsis L. sect. Pugiopappus | | a | i | Coreopsis L. sect. Pugiopappus | | Asteraceae |
| Coreopsis L. sect. Silphidium | | a | i | Coreopsis L. sect. Silphidium | | Asteraceae |
| Coreopsis L. sect. Tuckermannia | | a | i | Coreopsis L. sect. Tuckermannia | | Asteraceae |
| Corethamnium R. M. King & H. Rob. | | a | | Corethamnium R. M. King & H. Rob. | | Asteraceae |
| Corethrogyne DC. | | a | | Corethrogyne DC. | | Asteraceae |
| Coronidium Paul G. Wilson | | a | | Coronidium Paul G. Wilson | | Asteraceae |
| Coronocarpus Schumach. | Aspilia Thouars | | | Coronocarpus Schumach. | Aspilia Thouars | Asteraceae |
| Correllia A. M. Powell | | a | | Correllia A. M. Powell | | Asteraceae |
| Corymbium Gronov. | | a | | Corymbium Gronov. | | Asteraceae |
| Cosmidium Nutt. | Thelesperma Less. | | | Cosmidium Nutt. | Thelesperma Less. | Asteraceae |
| Cosmos Cav. | | a | | Cosmos Cav. | | Asteraceae |
| Cota J. Gay | | a | | Cota J. Gay | | Asteraceae |
| Cotula L. | | a | | Cotula L. | | Asteraceae |
| Coulterella Vasey & Rose | | a | | Coulterella Vasey & Rose | | Asteraceae |
| Cousinia Cass. | | a | | Cousinia Cass. | | Asteraceae |
| Cousiniopsis Nevski | | a | | Cousiniopsis Nevski | | Asteraceae |
| Craspedia G. Forst. | | a | | Craspedia G. Forst. | | Asteraceae |
| Crassina Scepin | Zinnia L. | | | Crassina Scepin | Zinnia L. | Asteraceae |
| Crassocephalum Moench | | a | | Crassocephalum Moench | | Asteraceae |
| Crassothonna B. Nord. | | a | | Crassothonna B. Nord. | | Asteraceae |
| Cratystylis S. Moore | | a | | Cratystylis S. Moore | | Asteraceae |
| Cremanthodium Benth. | | a | | Cremanthodium Benth. | | Asteraceae |
| Cremnothamnus Puttock | | a | | Cremnothamnus Puttock | | Asteraceae |
| Crepidiastrum Nakai | | a | | Crepidiastrum Nakai | | Asteraceae |
| Crepidifolium Sennikov | | a | | Crepidifolium Sennikov | | Asteraceae |
| Crepidopsis Arv.-Touv. | Hieracium L. | | | Crepidopsis Arv.-Touv. | Hieracium L. | Asteraceae |
| Crepis L. | | a | | Crepis L. | | Asteraceae |
| Crinitaria Cass. | Galatella Cass. | | | Crinitaria Cass. | Galatella Cass. | Asteraceae |
| Crinitina Soják | Galatella Cass. | | | Crinitina Soják | Galatella Cass. | Asteraceae |
| Criscia Katinas | | a | | Criscia Katinas | | Asteraceae |
| Critonia P. Browne | | a | | Critonia P. Browne | | Asteraceae |
| Critoniadelphus R. M. King & H. Rob. | | a | | Critoniadelphus R. M. King & H. Rob. | | Asteraceae |
| Critoniella R. M. King & H. Rob. | | a | | Critoniella R. M. King & H. Rob. | | Asteraceae |
| Critoniopsis Sch. Bip. | | a | | Critoniopsis Sch. Bip. | | Asteraceae |
| Crocidium Hook. | | a | | Crocidium Hook. | | Asteraceae |
| Crockeria Greene ex A. Gray | Lasthenia Cass. | | | Crockeria Greene ex A. Gray | Lasthenia Cass. | Asteraceae |
| Cronquistia R. M. King | Carphochaete A. Gray | | | Cronquistia R. M. King | Carphochaete A. Gray | Asteraceae |
| Cronquistianthus R. M. King & H. Rob. | | a | | Cronquistianthus R. M. King & H. Rob. | | Asteraceae |
| Croptilon Raf. | | a | | Croptilon Raf. | | Asteraceae |
| Crossostephium Less. | | a | | Crossostephium Less. | | Asteraceae |
| Crossothamnus R. M. King & H. Rob. | | a | | Crossothamnus R. M. King & H. Rob. | | Asteraceae |
| Crupina (Pers.) DC. | | a | | Crupina (Pers.) DC. | | Asteraceae |
| Cryptostemma R. Br. | Arctotheca J. C. Wendl. | | | Cryptostemma R. Br. | Arctotheca J. C. Wendl. | Asteraceae |
| Crystallopollen Steetz | Polydora Fenzl | | | Crystallopollen Steetz | Polydora Fenzl | Asteraceae |
| Cuatrecasanthus H. Rob. | | a | | Cuatrecasanthus H. Rob. | | Asteraceae |
| Cuatrecasasiella H. Rob. | | a | | Cuatrecasasiella H. Rob. | | Asteraceae |
| Cuchumatanea Seid. & Beaman | | a | | Cuchumatanea Seid. & Beaman | | Asteraceae |
| Culcitium Humb. & Bonpl. | Senecio L. | | | Culcitium Humb. & Bonpl. | Senecio L. | Asteraceae |
| Cullumia R. Br. | | a | | Cullumia R. Br. | | Asteraceae |
| Cuniculotinus Urbatsch et al. | | a | | Cuniculotinus Urbatsch et al. | | Asteraceae |
| Curio P. V. Heath | | a | | Curio P. V. Heath | | Asteraceae |
| Cuspidia Gaertn. | | a | | Cuspidia Gaertn. | | Asteraceae |
| Cyanopsis Cass. | Volutaria Cass. | | | Cyanopsis Cass. | Volutaria Cass. | Asteraceae |
| Cyanthillium Blume | | a | | Cyanthillium Blume | | Asteraceae |
| Cyanus Mill. | Centaurea L. | | | Cyanus Mill. | Centaurea L. | Asteraceae |
| Cyathocline Cass. | | a | | Cyathocline Cass. | | Asteraceae |
| Cyathomone S. F. Blake | | a | | Cyathomone S. F. Blake | | Asteraceae |
| Cyclachaena Fresen. ex Schltdl. | | a | | Cyclachaena Fresen. ex Schltdl. | | Asteraceae |
| Cyclolepis Gillies ex D. Don | | a | | Cyclolepis Gillies ex D. Don | | Asteraceae |
| Cylindrocline Cass. | | a | | Cylindrocline Cass. | | Asteraceae |
| Cymbolaena Smoljan. | Filago Loefl. | | | Cymbolaena Smoljan. | Filago Loefl. | Asteraceae |
| Cymbonotus Cass. | | a | | Cymbonotus Cass. | | Asteraceae |
| Cymbopappus B. Nord. | | a | | Cymbopappus B. Nord. | | Asteraceae |
| Cymophora B. L. Rob. | Tridax L. | | | Cymophora B. L. Rob. | Tridax L. | Asteraceae |
| Cynara L. | | a | | Cynara L. | | Asteraceae |
| Cynaroides (Boiss. ex Walp.) Dostál | Centaurea L. | | | Cynaroides (Boiss. ex Walp.) Dostál | Centaurea L. | Asteraceae |
| Cynaropsis Kuntze | Cynara L. | | | Cynaropsis Kuntze | Cynara L. | Asteraceae |
| Cyrtocymura H. Rob. | | a | | Cyrtocymura H. Rob. | | Asteraceae |
| Dacryotrichia Wild | | a | | Dacryotrichia Wild | | Asteraceae |
| Dahlia Cav. | | a | | Dahlia Cav. | | Asteraceae |
| Damnamenia Given | | a | | Damnamenia Given | | Asteraceae |
| Damnxanthodium Strother | | a | | Damnxanthodium Strother | | Asteraceae |
| Darwiniothamnus Harling | Erigeron L. | | | Darwiniothamnus Harling | Erigeron L. | Asteraceae |
| Dasyandantha H. Rob. | | a | | Dasyandantha H. Rob. | | Asteraceae |
| Dasyanthina H. Rob. | | a | | Dasyanthina H. Rob. | | Asteraceae |
| Dasycondylus R. M. King & H. Rob. | | a | | Dasycondylus R. M. King & H. Rob. | | Asteraceae |
| Dasyphyllum Kunth | | a | | Dasyphyllum Kunth | | Asteraceae |
| Daumailia Arènes | Urospermum Scop. | | | Daumailia Arènes | Urospermum Scop. | Asteraceae |
| Dauresia B. Nord. & Pelser | | a | | Dauresia B. Nord. & Pelser | | Asteraceae |
| Daveaua Willk. ex Mariz | | a | | Daveaua Willk. ex Mariz | | Asteraceae |
| Decachaeta DC. | | a | | Decachaeta DC. | | Asteraceae |
| Decaneuropsis H. Rob. & Skvarla | | a | | Decaneuropsis H. Rob. & Skvarla | | Asteraceae |
| Decastylocarpus Humbert | | a | | Decastylocarpus Humbert | | Asteraceae |
| Decazesia F. Muell. | | a | | Decazesia F. Muell. | | Asteraceae |
| Deinandra Greene | | a | | Deinandra Greene | | Asteraceae |
| Delairea Lem. | | a | | Delairea Lem. | | Asteraceae |
| Delamerea S. Moore | | a | | Delamerea S. Moore | | Asteraceae |
| Delilia Spreng. | | a | | Delilia Spreng. | | Asteraceae |
| Demidium DC. | Gnaphalium L. | | | Demidium DC. | Gnaphalium L. | Asteraceae |
| Dendranthema (DC.) Des Moul. | Chrysanthemum L. | | | Dendranthema (DC.) Des Moul. | Chrysanthemum L. | Asteraceae |
| Dendrocacalia (Nakai) Nakai ex Tuyama | | a | | Dendrocacalia (Nakai) Nakai ex Tuyama | | Asteraceae |
| Dendrophorbium C. Jeffrey | | a | | Dendrophorbium C. Jeffrey | | Asteraceae |
| Dendrosenecio (Hauman ex Hedberg) B. Nord. | | a | | Dendrosenecio (Hauman ex Hedberg) B. Nord. | | Asteraceae |
| Dendroseris D. Don | | a | | Dendroseris D. Don | | Asteraceae |
| Dendroviguiera E. E. Schill. & Panero | | a | | Dendroviguiera E. E. Schill. & Panero | | Asteraceae |
| Denekia Thunb. | | a | | Denekia Thunb. | | Asteraceae |
| Desmanthodium Benth. | | a | | Desmanthodium Benth. | | Asteraceae |
| Dewildemania O. Hoffm. | | a | | Dewildemania O. Hoffm. | | Asteraceae |
| Diacranthera R. M. King & H. Rob. | | a | | Diacranthera R. M. King & H. Rob. | | Asteraceae |
| Dianthoseris Sch. Bip. | Crepis L. | | | Dianthoseris Sch. Bip. | Crepis L. | Asteraceae |
| Diaperia Nutt. | | a | | Diaperia Nutt. | | Asteraceae |
| Diaphractanthus Humbert | | a | | Diaphractanthus Humbert | | Asteraceae |
| Diaspananthus Miq. | | a | | Diaspananthus Miq. | | Asteraceae |
| Diazeuxis D. Don | Lycoseris Cass. | | | Diazeuxis D. Don | Lycoseris Cass. | Asteraceae |
| Dicercoclados C. Jeffrey & Y. L. Chen | | a | | Dicercoclados C. Jeffrey & Y. L. Chen | | Asteraceae |
| Dicerothamnus Koek. | | a | | Dicerothamnus Koek. | | Asteraceae |
| Dicoma Cass. | | a | | Dicoma Cass. | | Asteraceae |
| Dicoria Torr. & A. Gray | | a | | Dicoria Torr. & A. Gray | | Asteraceae |
| Dicranocarpus A. Gray | | a | | Dicranocarpus A. Gray | | Asteraceae |
| Didelta LʼHér. | | a | | Didelta LʼHér. | | Asteraceae |
| Dielitzia P. S. Short | | a | | Dielitzia P. S. Short | | Asteraceae |
| Dieteria Nutt. | | a | | Dieteria Nutt. | | Asteraceae |
| Digitacalia Pippen | | a | | Digitacalia Pippen | | Asteraceae |
| Dichaetophora A. Gray | | a | | Dichaetophora A. Gray | | Asteraceae |
| Dichrocephala LʼHér. ex DC. | | a | | Dichrocephala LʼHér. ex DC. | | Asteraceae |
| Dichromochlamys Dunlop | | a | | Dichromochlamys Dunlop | | Asteraceae |
| Dillandia V. A. Funk & H. Rob. | | a | | Dillandia V. A. Funk & H. Rob. | | Asteraceae |
| Dimeresia A. Gray | | a | | Dimeresia A. Gray | | Asteraceae |
| Dimerostemma Cass. | | a | | Dimerostemma Cass. | | Asteraceae |
| Dimorphocoma F. Muell. & Tate | | a | | Dimorphocoma F. Muell. & Tate | | Asteraceae |
| Dimorphotheca Moench | | a | | Dimorphotheca Moench | | Asteraceae |
| Dinoseris Griseb. | | a | | Dinoseris Griseb. | | Asteraceae |
| Diodontium F. Muell. | | a | | Diodontium F. Muell. | | Asteraceae |
| Diotis Desf. | Otanthus Hoffmanns. & Link | | | Diotis Desf. | Otanthus Hoffmanns. & Link | Asteraceae |
| Diplazoptilon Y. Ling | | a | | Diplazoptilon Y. Ling | | Asteraceae |
| Diplopappus Cass. | Chrysopsis (Nutt.) Elliott | | | Diplopappus Cass. | Chrysopsis (Nutt.) Elliott | Asteraceae |
| Diplostephium Kunth | | a | | Diplostephium Kunth | | Asteraceae |
| Diplothrix DC. | Zinnia L. | | | Diplothrix DC. | Zinnia L. | Asteraceae |
| Dipterocome Fisch. & C. A. Mey. | | a | | Dipterocome Fisch. & C. A. Mey. | | Asteraceae |
| Dipterocypsela S. F. Blake | | a | | Dipterocypsela S. F. Blake | | Asteraceae |
| Disparago Gaertn. | | a | | Disparago Gaertn. | | Asteraceae |
| Dissothrix A. Gray | | a | | Dissothrix A. Gray | | Asteraceae |
| Distasis DC. | Chaetopappa DC. | | | Distasis DC. | Chaetopappa DC. | Asteraceae |
| Distephanus Cass. | | a | | Distephanus Cass. | | Asteraceae |
| Distoecha Phil. | Hypochaeris L. | | | Distoecha Phil. | Hypochaeris L. | Asteraceae |
| Distreptus Cass. | Pseudelephantopus Rohr | | | Distreptus Cass. | Pseudelephantopus Rohr | Asteraceae |
| Disynaphia DC. | | a | | Disynaphia DC. | | Asteraceae |
| Dithyrostegia A. Gray | | a | | Dithyrostegia A. Gray | | Asteraceae |
| Dittrichia Greuter | | a | | Dittrichia Greuter | | Asteraceae |
| Doellingeria Nees | | a | | Doellingeria Nees | | Asteraceae |
| Dolichlasium Lag. | | a | | Dolichlasium Lag. | | Asteraceae |
| Dolichoglottis B. Nord. | | a | | Dolichoglottis B. Nord. | | Asteraceae |
| Dolichorrhiza (Pojark.) Galushko | | a | | Dolichorrhiza (Pojark.) Galushko | | Asteraceae |
| Dolichothrix Hilliard & B. L. Burtt | | a | | Dolichothrix Hilliard & B. L. Burtt | | Asteraceae |
| Dolomiaea DC. | | a | | Dolomiaea DC. | | Asteraceae |
| Dolosanthus Klatt | Baccharoides Moench | | | Dolosanthus Klatt | Baccharoides Moench | Asteraceae |
| Doniophyton Wedd. | | a | | Doniophyton Wedd. | | Asteraceae |
| Doratolepis Schltdl. | Leptorhynchos Less. | | | Doratolepis Schltdl. | Leptorhynchos Less. | Asteraceae |
| Doria Thunb. | Othonna L. | | | Doria Thunb. | Othonna L. | Asteraceae |
| Dorobaea Cass. | | a | | Dorobaea Cass. | | Asteraceae |
| Doronicum L. | | a | | Doronicum L. | | Asteraceae |
| Dracopis (Cass.) Cass. | Rudbeckia L. | | | Dracopis (Cass.) Cass. | Rudbeckia L. | Asteraceae |
| Dresslerothamnus H. Rob. | | a | | Dresslerothamnus H. Rob. | | Asteraceae |
| Dubautia Gaudich. | | a | | Dubautia Gaudich. | | Asteraceae |
| Dubyaea DC. | | a | | Dubyaea DC. | | Asteraceae |
| Dugaldia Cass. | Hymenoxys Cass. | | | Dugaldia Cass. | Hymenoxys Cass. | Asteraceae |
| Dugesia A. Gray | | a | | Dugesia A. Gray | | Asteraceae |
| Duhaldea DC. | | a | | Duhaldea DC. | | Asteraceae |
| Duidaea S. F. Blake | | a | | Duidaea S. F. Blake | | Asteraceae |
| Duseniella K. Schum. | | a | | Duseniella K. Schum. | | Asteraceae |
| Dymondia Compton | | a | | Dymondia Compton | | Asteraceae |
| Dyscritogyne R. M. King & H. Rob. | Steviopsis R. M. King & H. Rob. | | | Dyscritogyne R. M. King & H. Rob. | Steviopsis R. M. King & H. Rob. | Asteraceae |
| Dyscritothamnus B. L. Rob. | | a | | Dyscritothamnus B. L. Rob. | | Asteraceae |
| Dysodiopsis (A. Gray) Rydb. | | a | | Dysodiopsis (A. Gray) Rydb. | | Asteraceae |
| Dysodium Rich. | Melampodium L. | | | Dysodium Rich. | Melampodium L. | Asteraceae |
| Dyssodia Cav. | | a | | Dyssodia Cav. | | Asteraceae |
| Eastwoodia Brandegee | | a | | Eastwoodia Brandegee | | Asteraceae |
| Eatonella A. Gray | | a | | Eatonella A. Gray | | Asteraceae |
| Eclipta L. | | a | | Eclipta L. | | Asteraceae |
| Edmondia Cass. | | a | | Edmondia Cass. | | Asteraceae |
| Egania J. Rémy | Chaetanthera Ruiz & Pav. | | | Egania J. Rémy | Chaetanthera Ruiz & Pav. | Asteraceae |
| Egletes Cass. | | a | | Egletes Cass. | | Asteraceae |
| Echinacea Moench | | a | | Echinacea Moench | | Asteraceae |
| Echinocoryne H. Rob. | | a | | Echinocoryne H. Rob. | | Asteraceae |
| Echinops L. | | a | | Echinops L. | | Asteraceae |
| Eirmocephala H. Rob. | | a | | Eirmocephala H. Rob. | | Asteraceae |
| Eitenia R. M. King & H. Rob. | | a | | Eitenia R. M. King & H. Rob. | | Asteraceae |
| Ekmania Gleason | | a | | Ekmania Gleason | | Asteraceae |
| Ekmaniopappus Borhidi | | a | | Ekmaniopappus Borhidi | | Asteraceae |
| Elachanthemum Y. Ling & Y. R. Ling | Artemisia L. | | | Elachanthemum Y. Ling & Y. R. Ling | Artemisia L. | Asteraceae |
| Elachanthus F. Muell. | | a | | Elachanthus F. Muell. | | Asteraceae |
| Elaphandra Strother | | a | | Elaphandra Strother | | Asteraceae |
| Elekmania B. Nord. | | a | | Elekmania B. Nord. | | Asteraceae |
| Elephantopus L. | | a | | Elephantopus L. | | Asteraceae |
| Eleutheranthera Poit. ex Bosc | | a | | Eleutheranthera Poit. ex Bosc | | Asteraceae |
| Elichrysum Mill., orth. var. | Helichrysum Mill. | | | Elichrysum Mill., orth. var. | Helichrysum Mill. | Asteraceae |
| Ellenbergia Cuatrec. | | a | | Ellenbergia Cuatrec. | | Asteraceae |
| Elvira Cass. | Delilia Spreng. | | | Elvira Cass. | Delilia Spreng. | Asteraceae |
| Elytropappus Cass. | | a | | Elytropappus Cass. | | Asteraceae |
| Embergeria Boulos | | a | | Embergeria Boulos | | Asteraceae |
| Emilia Cass. | | a | | Emilia Cass. | | Asteraceae |
| Emiliella S. Moore | | a | | Emiliella S. Moore | | Asteraceae |
| Encelia Adans. | | a | | Encelia Adans. | | Asteraceae |
| Enceliopsis (A. Gray) A. Nelson | | a | | Enceliopsis (A. Gray) A. Nelson | | Asteraceae |
| Endocellion Turcz. ex Herder | | a | | Endocellion Turcz. ex Herder | | Asteraceae |
| Endopappus Sch. Bip. | | a | | Endopappus Sch. Bip. | | Asteraceae |
| Engelmannia A. Gray ex Nutt. | | a | | Engelmannia A. Gray ex Nutt. | | Asteraceae |
| Engleria O. Hoffm. | | a | | Engleria O. Hoffm. | | Asteraceae |
| Enydra Lour. | | a | | Enydra Lour. | | Asteraceae |
| Epallage DC. | Anisopappus Hook. & Arn. | | | Epallage DC. | Anisopappus Hook. & Arn. | Asteraceae |
| Epaltes Cass. | | a | | Epaltes Cass. | | Asteraceae |
| Epilasia (Bunge) Benth. | | a | | Epilasia (Bunge) Benth. | | Asteraceae |
| Epilepis Benth. | Coreopsis L. | | | Epilepis Benth. | Coreopsis L. | Asteraceae |
| Episcothamnus H. Rob. | Lychnophoriopsis Sch. Bip. | | | Episcothamnus H. Rob. | Lychnophoriopsis Sch. Bip. | Asteraceae |
| Epitriche Turcz. | | a | | Epitriche Turcz. | | Asteraceae |
| Erato DC. | | a | | Erato DC. | | Asteraceae |
| Erechtites Raf. | | a | | Erechtites Raf. | | Asteraceae |
| Eremanthus Less. | | a | | Eremanthus Less. | | Asteraceae |
| Eremiastrum A. Gray | Monoptilon Torr. & A. Gray | | | Eremiastrum A. Gray | Monoptilon Torr. & A. Gray | Asteraceae |
| Eremonanus I. M. Johnst. | Eriophyllum Lag. | | | Eremonanus I. M. Johnst. | Eriophyllum Lag. | Asteraceae |
| Eremosis (DC.) Gleason | | a | | Eremosis (DC.) Gleason | | Asteraceae |
| Eremothamnus O. Hoffm. | | a | | Eremothamnus O. Hoffm. | | Asteraceae |
| Eriachaenium Sch. Bip. | | a | | Eriachaenium Sch. Bip. | | Asteraceae |
| Ericameria Nutt. | | a | | Ericameria Nutt. | | Asteraceae |
| Ericentrodea S. F. Blake & Sherff | | a | | Ericentrodea S. F. Blake & Sherff | | Asteraceae |
| Erigeron L. | | a | | Erigeron L. | | Asteraceae |
| Erinacella (Rech. f.) Dostál | Myopordon Boiss. | | | Erinacella (Rech. f.) Dostál | Myopordon Boiss. | Asteraceae |
| Eriocarpum Nutt. | Machaeranthera Nees | | | Eriocarpum Nutt. | Machaeranthera Nees | Asteraceae |
| Eriocephalus L. | | a | | Eriocephalus L. | | Asteraceae |
| Eriocoma Kunth | Montanoa Cerv. | | | Eriocoma Kunth | Montanoa Cerv. | Asteraceae |
| Eriochlamys Sond. & F. Muell. | | a | | Eriochlamys Sond. & F. Muell. | | Asteraceae |
| Eriophyllum Lag. | | a | | Eriophyllum Lag. | | Asteraceae |
| Eriosphaera Less. | Galeomma Rauschert | | | Eriosphaera Less. | Galeomma Rauschert | Asteraceae |
| Eriothrix Cass., orth. var. | Eriotrix Cass. | | | Eriothrix Cass., orth. var. | Eriotrix Cass. | Asteraceae |
| Eriotrix Cass. | | a | | Eriotrix Cass. | | Asteraceae |
| Erlangea Sch. Bip. | | a | | Erlangea Sch. Bip. | | Asteraceae |
| Erodiophyllum F. Muell. | | a | | Erodiophyllum F. Muell. | | Asteraceae |
| Erymophyllum Paul G. Wilson | | a | | Erymophyllum Paul G. Wilson | | Asteraceae |
| Eryngiophyllum Greenm. | | a | | Eryngiophyllum Greenm. | | Asteraceae |
| Erythradenia (B. L. Rob.) R. M. King & H. Rob. | | a | | Erythradenia (B. L. Rob.) R. M. King & H. Rob. | | Asteraceae |
| Erythrocephalum Benth. | | a | | Erythrocephalum Benth. | | Asteraceae |
| Erythrochaete Siebold & Zucc. | Ligularia Cass. | | | Erythrochaete Siebold & Zucc. | Ligularia Cass. | Asteraceae |
| Erythroseris N. Kilian & Gemeinholzer | | a | | Erythroseris N. Kilian & Gemeinholzer | | Asteraceae |
| Espejoa DC. | | a | | Espejoa DC. | | Asteraceae |
| Espeletia Mutis ex Bonpl. | | a | | Espeletia Mutis ex Bonpl. | | Asteraceae |
| Espeletiopsis Cuatrec. | | a | | Espeletiopsis Cuatrec. | | Asteraceae |
| Ethulia L. f. | | a | | Ethulia L. f. | | Asteraceae |
| Eucephalus Nutt. | | a | | Eucephalus Nutt. | | Asteraceae |
| Euchiton Cass. | | a | | Euchiton Cass. | | Asteraceae |
| Eumorphia DC. | | a | | Eumorphia DC. | | Asteraceae |
| Eupatoriadelphus R. M. King & H. Rob. | Eutrochium Raf. | | | Eupatoriadelphus R. M. King & H. Rob. | Eutrochium Raf. | Asteraceae |
| Eupatoriastrum Greenm. | | a | | Eupatoriastrum Greenm. | | Asteraceae |
| Eupatorina R. M. King & H. Rob. | | a | | Eupatorina R. M. King & H. Rob. | | Asteraceae |
| Eupatoriopsis Hieron. | | a | | Eupatoriopsis Hieron. | | Asteraceae |
| Eupatorium L. | | a | | Eupatorium L. | | Asteraceae |
| Euphrosyne DC. | | a | | Euphrosyne DC. | | Asteraceae |
| Eurybia (Cass.) Cass. | | a | | Eurybia (Cass.) Cass. | | Asteraceae |
| Eurybiopsis DC. | | a | | Eurybiopsis DC. | | Asteraceae |
| Eurydochus Maguire & Wurdack | | a | | Eurydochus Maguire & Wurdack | | Asteraceae |
| Euryops (Cass.) Cass. | | a | | Euryops (Cass.) Cass. | | Asteraceae |
| Eutetras A. Gray | | a | | Eutetras A. Gray | | Asteraceae |
| Euthamia (Nutt.) Cass. | | a | | Euthamia (Nutt.) Cass. | | Asteraceae |
| Eutrochium Raf. | | a | | Eutrochium Raf. | | Asteraceae |
| Evacidium Pomel | Filago Loefl. | | | Evacidium Pomel | Filago Loefl. | Asteraceae |
| Evax Gaertn. | Filago Loefl. | | | Evax Gaertn. | Filago Loefl. | Asteraceae |
| Ewartia Beauverd | | a | | Ewartia Beauverd | | Asteraceae |
| Ewartiothamnus Anderb. | | a | | Ewartiothamnus Anderb. | | Asteraceae |
| Exomiocarpon Lawalrée | | a | | Exomiocarpon Lawalrée | | Asteraceae |
| Faberia Hemsl. | | a | | Faberia Hemsl. | | Asteraceae |
| Faberiopsis C. Shih & Y. L. Chen | Faberia Hemsl. | | | Faberiopsis C. Shih & Y. L. Chen | Faberia Hemsl. | Asteraceae |
| Facelis Cass. | | a | | Facelis Cass. | | Asteraceae |
| Farfugium Lindl. | | a | | Farfugium Lindl. | | Asteraceae |
| Faujasia Cass. | | a | | Faujasia Cass. | | Asteraceae |
| Faujasiopsis C. Jeffrey | | a | | Faujasiopsis C. Jeffrey | | Asteraceae |
| Faxonia Brandegee | | a | | Faxonia Brandegee | | Asteraceae |
| Feddea Urb. | | a | | Feddea Urb. | | Asteraceae |
| Feldstonia P. S. Short | | a | | Feldstonia P. S. Short | | Asteraceae |
| Felicia Cass. | | a | | Felicia Cass. | | Asteraceae |
| Femeniasia Susanna | Carduncellus Adans. | | | Femeniasia Susanna | Carduncellus Adans. | Asteraceae |
| Fenixia Merr. | | a | | Fenixia Merr. | | Asteraceae |
| Ferdinanda Lag. | Zaluzania Pers. | | | Ferdinanda Lag. | Zaluzania Pers. | Asteraceae |
| Ferreyranthus H. Rob. & Brettell | | a | | Ferreyranthus H. Rob. & Brettell | | Asteraceae |
| Ferreyrella S. F. Blake | | a | | Ferreyrella S. F. Blake | | Asteraceae |
| Filaginella Opiz | Gnaphalium L. | | | Filaginella Opiz | Gnaphalium L. | Asteraceae |
| Filago Loefl. | | a | | Filago Loefl. | | Asteraceae |
| Filifolium Kitam. | | a | | Filifolium Kitam. | | Asteraceae |
| Fitchia Hook. f. | | a | | Fitchia Hook. f. | | Asteraceae |
| Fitzwillia P. S. Short | | a | | Fitzwillia P. S. Short | | Asteraceae |
| Flaveria Juss. | | a | | Flaveria Juss. | | Asteraceae |
| Fleischmannia Sch. Bip. | | a | | Fleischmannia Sch. Bip. | | Asteraceae |
| Fleischmanniana Sch. Bip., orth. var. | Fleischmannia Sch. Bip. | | | Fleischmanniana Sch. Bip., orth. var. | Fleischmannia Sch. Bip. | Asteraceae |
| Fleischmanniopsis R. M. King & H. Rob. | | a | | Fleischmanniopsis R. M. King & H. Rob. | | Asteraceae |
| Florestina Cass. | | a | | Florestina Cass. | | Asteraceae |
| Floscaldasia Cuatrec. | | a | | Floscaldasia Cuatrec. | | Asteraceae |
| Flosmutisia Cuatrec. | | a | | Flosmutisia Cuatrec. | | Asteraceae |
| Flotovia Spreng. | Dasyphyllum Kunth | | | Flotovia Spreng. | Dasyphyllum Kunth | Asteraceae |
| Flourensia DC. | | a | | Flourensia DC. | | Asteraceae |
| Flyriella R. M. King & H. Rob. | | a | | Flyriella R. M. King & H. Rob. | | Asteraceae |
| Fontquera Maire | Perralderia Coss. | | | Fontquera Maire | Perralderia Coss. | Asteraceae |
| Formania W. W. Sm. & Small | | a | | Formania W. W. Sm. & Small | | Asteraceae |
| Foveolina Källersjö | | a | | Foveolina Källersjö | | Asteraceae |
| Francoeuria Cass. | Pulicaria Gaertn. | | | Francoeuria Cass. | Pulicaria Gaertn. | Asteraceae |
| Franseria Cav. | Ambrosia L. | | | Franseria Cav. | Ambrosia L. | Asteraceae |
| Freya V. M. Badillo | | a | | Freya V. M. Badillo | | Asteraceae |
| Frolovia (DC.) Lipsch. | | a | | Frolovia (DC.) Lipsch. | | Asteraceae |
| Fulcaldea Poir. | | a | | Fulcaldea Poir. | | Asteraceae |
| Gaertneria Medik. | Ambrosia L. | | | Gaertneria Medik. | Ambrosia L. | Asteraceae |
| Gaillardia Foug. | | a | | Gaillardia Foug. | | Asteraceae |
| Galactites Moench | | a | | Galactites Moench | | Asteraceae |
| Galatella Cass. | | a | | Galatella Cass. | | Asteraceae |
| Galeana La Llave | | a | | Galeana La Llave | | Asteraceae |
| Galeomma Rauschert | | a | | Galeomma Rauschert | | Asteraceae |
| Galinsoga Ruiz & Pav. | | a | | Galinsoga Ruiz & Pav. | | Asteraceae |
| Gamochaeta Wedd. | | a | | Gamochaeta Wedd. | | Asteraceae |
| Gamochaetopsis Anderb. & S. E. Freire | | a | | Gamochaetopsis Anderb. & S. E. Freire | | Asteraceae |
| Gamolepis Less. | Steirodiscus Less. | | | Gamolepis Less. | Steirodiscus Less. | Asteraceae |
| Garberia A. Gray | | a | | Garberia A. Gray | | Asteraceae |
| Garcibarrigoa Cuatrec. | | a | | Garcibarrigoa Cuatrec. | | Asteraceae |
| Garcilassa Poepp. | Hymenostephium Benth. | | | Garcilassa Poepp. | Hymenostephium Benth. | Asteraceae |
| Gardnerina R. M. King & H. Rob. | | a | | Gardnerina R. M. King & H. Rob. | | Asteraceae |
| Garhadiolus Jaub. & Spach | | a | | Garhadiolus Jaub. & Spach | | Asteraceae |
| Garuleum Cass. | | a | | Garuleum Cass. | | Asteraceae |
| Gazania Gaertn. | | a | | Gazania Gaertn. | | Asteraceae |
| Gazaniopsis C. Huber | | | | Gazaniopsis C. Huber | | Asteraceae |
| Geigeria Griess. | | a | | Geigeria Griess. | | Asteraceae |
| Geissolepis B. L. Rob. | | a | | Geissolepis B. L. Rob. | | Asteraceae |
| Geissopappus Benth. | Calea L. | | | Geissopappus Benth. | Calea L. | Asteraceae |
| Georgina Willd. | Dahlia Cav. | | | Georgina Willd. | Dahlia Cav. | Asteraceae |
| Geraea Torr. & A. Gray | | a | | Geraea Torr. & A. Gray | | Asteraceae |
| Gerbera L. | | a | | Gerbera L. | | Asteraceae |
| Geropogon L. | | a | | Geropogon L. | | Asteraceae |
| Gibbaria Cass. | | a | | Gibbaria Cass. | | Asteraceae |
| Gifola Cass. | Filago Loefl. | | | Gifola Cass. | Filago Loefl. | Asteraceae |
| Gilberta Turcz. | | a | | Gilberta Turcz. | | Asteraceae |
| Gilruthia Ewart | | a | | Gilruthia Ewart | | Asteraceae |
| Gladiopappus Humbert | | a | | Gladiopappus Humbert | | Asteraceae |
| Glaziovianthus G. M. Barroso | Chresta Vell. ex DC. | | | Glaziovianthus G. M. Barroso | Chresta Vell. ex DC. | Asteraceae |
| Glebionis Cass. | | a | | Glebionis Cass. | | Asteraceae |
| Glossarion Maguire & Wurdack | | a | | Glossarion Maguire & Wurdack | | Asteraceae |
| Glossocardia Cass. | | a | | Glossocardia Cass. | | Asteraceae |
| Glossogyne Cass. | Glossocardia Cass. | | | Glossogyne Cass. | Glossocardia Cass. | Asteraceae |
| Glossopappus Kunze | | a | | Glossopappus Kunze | | Asteraceae |
| Glycideras DC. | Psiadia Jacq. ex Willd. | | | Glycideras DC. | Psiadia Jacq. ex Willd. | Asteraceae |
| Glyptopleura D. C. Eaton | | a | | Glyptopleura D. C. Eaton | | Asteraceae |
| Gnaphaliothamnus Kirp. | | a | | Gnaphaliothamnus Kirp. | | Asteraceae |
| Gnaphalium L. | | a | | Gnaphalium L. | | Asteraceae |
| Gnaphalodes Mill. | Actinobole Endl. | | | Gnaphalodes Mill. | Actinobole Endl. | Asteraceae |
| Gnephosis Cass. | | a | | Gnephosis Cass. | | Asteraceae |
| Gnomophalium Greuter | | a | | Gnomophalium Greuter | | Asteraceae |
| Gochnatia Kunth | | a | | Gochnatia Kunth | | Asteraceae |
| Goldmanella Greenm. | | a | | Goldmanella Greenm. | | Asteraceae |
| Gongrostylus R. M. King & H. Rob. | | a | | Gongrostylus R. M. King & H. Rob. | | Asteraceae |
| Gongrothamnus Steetz | Distephanus Cass. | | | Gongrothamnus Steetz | Distephanus Cass. | Asteraceae |
| Gongylolepis R. H. Schomb. | | a | | Gongylolepis R. H. Schomb. | | Asteraceae |
| Goniocaulon Cass. | | a | | Goniocaulon Cass. | | Asteraceae |
| Gonospermum Less. | | a | | Gonospermum Less. | | Asteraceae |
| Gonzalezia E. E. Schill. & Panero | | a | | Gonzalezia E. E. Schill. & Panero | | Asteraceae |
| Gorceixia Baker | | a | | Gorceixia Baker | | Asteraceae |
| Gorteria L. | | a | | Gorteria L. | | Asteraceae |
| Gossweilera S. Moore | | a | | Gossweilera S. Moore | | Asteraceae |
| Goyazianthus R. M. King & H. Rob. | | a | | Goyazianthus R. M. King & H. Rob. | | Asteraceae |
| Graciela Rzed. | Strotheria B. L. Turner | | | Graciela Rzed. | Strotheria B. L. Turner | Asteraceae |
| Graemia Hook. | Helenium L. | | | Graemia Hook. | Helenium L. | Asteraceae |
| Grangea Adans. | | a | | Grangea Adans. | | Asteraceae |
| Grangeopsis Humbert | | a | | Grangeopsis Humbert | | Asteraceae |
| Grantia Boiss. | Iphiona Cass. | | | Grantia Boiss. | Iphiona Cass. | Asteraceae |
| Graphistylis B. Nord. | | a | | Graphistylis B. Nord. | | Asteraceae |
| Gratwickia F. Muell. | | a | | Gratwickia F. Muell. | | Asteraceae |
| Grauanthus Fayed | | a | | Grauanthus Fayed | | Asteraceae |
| Grazielia R. M. King & H. Rob. | | a | | Grazielia R. M. King & H. Rob. | | Asteraceae |
| Greenella A. Gray | Gutierrezia Lag. | | | Greenella A. Gray | Gutierrezia Lag. | Asteraceae |
| Greenmaniella W. M. Sharp | | a | | Greenmaniella W. M. Sharp | | Asteraceae |
| Grindelia Willd. | | a | | Grindelia Willd. | | Asteraceae |
| Grisebachianthus R. M. King & H. Rob. | | a | | Grisebachianthus R. M. King & H. Rob. | | Asteraceae |
| Grossheimia Sosn. & Takht. | Centaurea L. | | | Grossheimia Sosn. & Takht. | Centaurea L. | Asteraceae |
| Grosvenoria R. M. King & H. Rob. | | a | | Grosvenoria R. M. King & H. Rob. | | Asteraceae |
| Guaicaia Maguire | Glossarion Maguire & Wurdack | | | Guaicaia Maguire | Glossarion Maguire & Wurdack | Asteraceae |
| Guardiola Cerv. ex Humb. & Bonpl. | | a | | Guardiola Cerv. ex Humb. & Bonpl. | | Asteraceae |
| Guayania R. M. King & H. Rob. | | a | | Guayania R. M. King & H. Rob. | | Asteraceae |
| Guentheria Spreng. | Gaillardia Foug. | | | Guentheria Spreng. | Gaillardia Foug. | Asteraceae |
| Guerreroia Merr. | Glossocardia Cass. | | | Guerreroia Merr. | Glossocardia Cass. | Asteraceae |
| Guevaria R. M. King & H. Rob. | | a | | Guevaria R. M. King & H. Rob. | | Asteraceae |
| Guizotia Cass. | | a | | Guizotia Cass. | | Asteraceae |
| Gundelia L. | | a | | Gundelia L. | | Asteraceae |
| Gundlachia A. Gray | | a | | Gundlachia A. Gray | | Asteraceae |
| Gutenbergia Sch. Bip. | | a | | Gutenbergia Sch. Bip. | | Asteraceae |
| Gutierrezia Lag. | | a | | Gutierrezia Lag. | | Asteraceae |
| Guynesomia Bonifacino & G. Sancho | | a | | Guynesomia Bonifacino & G. Sancho | | Asteraceae |
| Gymnanthemum Cass. | | a | | Gymnanthemum Cass. | | Asteraceae |
| Gymnarrhena Desf. | | a | | Gymnarrhena Desf. | | Asteraceae |
| Gymnocline Cass. | Tanacetum L. | | | Gymnocline Cass. | Tanacetum L. | Asteraceae |
| Gymnocondylus R. M. King & H. Rob. | | a | | Gymnocondylus R. M. King & H. Rob. | | Asteraceae |
| Gymnocoronis DC. | | a | | Gymnocoronis DC. | | Asteraceae |
| Gymnodiscus Less. | | a | | Gymnodiscus Less. | | Asteraceae |
| Gymnolaena (DC.) Rydb. | | a | | Gymnolaena (DC.) Rydb. | | Asteraceae |
| Gymnolomia Kunth | Wedelia Jacq. | | | Gymnolomia Kunth | Wedelia Jacq. | Asteraceae |
| Gymnopentzia Benth. | | a | | Gymnopentzia Benth. | | Asteraceae |
| Gymnopsis DC. | Aspilia Thouars | | | Gymnopsis DC. | Aspilia Thouars | Asteraceae |
| Gymnosperma Less. | | a | | Gymnosperma Less. | | Asteraceae |
| Gymnostephium Less. | | a | | Gymnostephium Less. | | Asteraceae |
| Gymnostyles Juss. | Soliva Ruiz & Pav. | | | Gymnostyles Juss. | Soliva Ruiz & Pav. | Asteraceae |
| Gynoxys Cass. | | a | | Gynoxys Cass. | | Asteraceae |
| Gynura Cass. | | a | | Gynura Cass. | | Asteraceae |
| Gypothamnium Phil. | | a | | Gypothamnium Phil. | | Asteraceae |
| Gyptidium R. M. King & H. Rob. | | a | | Gyptidium R. M. King & H. Rob. | | Asteraceae |
| Gyptis (Cass.) Cass. | | a | | Gyptis (Cass.) Cass. | | Asteraceae |
| Gyrodoma Wild | | a | | Gyrodoma Wild | | Asteraceae |
| Haarera Hutch. & E. A. Bruce | Erlangea Sch. Bip. | | | Haarera Hutch. & E. A. Bruce | Erlangea Sch. Bip. | Asteraceae |
| Haastia Hook. f. | | a | | Haastia Hook. f. | | Asteraceae |
| Haeckeria F. Muell. | | a | | Haeckeria F. Muell. | | Asteraceae |
| Haegiela P. S. Short & Paul G. Wilson | | a | | Haegiela P. S. Short & Paul G. Wilson | | Asteraceae |
| Hainanecio Ying Liu & Q. E. Yang | | a | | Hainanecio Ying Liu & Q. E. Yang | | Asteraceae |
| Halea Torr. & A. Gray | Tetragonotheca L. | | | Halea Torr. & A. Gray | Tetragonotheca L. | Asteraceae |
| Handelia Heimerl | | a | | Handelia Heimerl | | Asteraceae |
| Haplocalymma S. F. Blake | Viguiera Kunth | | | Haplocalymma S. F. Blake | Viguiera Kunth | Asteraceae |
| Haplocarpha Less. | | a | | Haplocarpha Less. | | Asteraceae |
| Haploesthes A. Gray | | a | | Haploesthes A. Gray | | Asteraceae |
| Haplopappus Cass. | | a | | Haplopappus Cass. | | Asteraceae |
| Haplostephium Mart. ex DC. | Lychnophora Mart. | | | Haplostephium Mart. ex DC. | Lychnophora Mart. | Asteraceae |
| Haptotrichion Paul G. Wilson | | a | | Haptotrichion Paul G. Wilson | | Asteraceae |
| Haradjania Rech. f. | Myopordon Boiss. | | | Haradjania Rech. f. | Myopordon Boiss. | Asteraceae |
| Harleya S. F. Blake | | a | | Harleya S. F. Blake | | Asteraceae |
| Harmonia B. G. Baldwin | | a | | Harmonia B. G. Baldwin | | Asteraceae |
| Harnackia Urb. | | a | | Harnackia Urb. | | Asteraceae |
| Haroldia Bonifacino | | a | | Haroldia Bonifacino | | Asteraceae |
| Harpalium (Cass.) Cass. | Helianthus L. | | | Harpalium (Cass.) Cass. | Helianthus L. | Asteraceae |
| Harthamnus H. Rob. | Plazia Ruiz & Pav. | | | Harthamnus H. Rob. | Plazia Ruiz & Pav. | Asteraceae |
| Hartwrightia A. Gray ex S. Watson | | a | | Hartwrightia A. Gray ex S. Watson | | Asteraceae |
| Hasteola Raf. | Senecio L. | | | Hasteola Raf. | Senecio L. | Asteraceae |
| Hatschbachiella R. M. King & H. Rob. | | a | | Hatschbachiella R. M. King & H. Rob. | | Asteraceae |
| Hazardia Greene | | a | | Hazardia Greene | | Asteraceae |
| Hebeclinium DC. | | a | | Hebeclinium DC. | | Asteraceae |
| Hecastocleis A. Gray | | a | | Hecastocleis A. Gray | | Asteraceae |
| Hedosyne Strother | | a | | Hedosyne Strother | | Asteraceae |
| Hedypnois Mill. | | a | | Hedypnois Mill. | | Asteraceae |
| Heiseria E. E. Schill. & Panero | | a | | Heiseria E. E. Schill. & Panero | | Asteraceae |
| Helenium L. | | a | | Helenium L. | | Asteraceae |
| Helianthella Torr. & A. Gray | | a | | Helianthella Torr. & A. Gray | | Asteraceae |
| Helianthopsis H. Rob. | Pappobolus S. F. Blake | | | Helianthopsis H. Rob. | Pappobolus S. F. Blake | Asteraceae |
| Helianthus L. | | a | | Helianthus L. | | Asteraceae |
| Helicta Cass. | Borrichia Adans. | | | Helicta Cass. | Borrichia Adans. | Asteraceae |
| Helichrysopsis Kirp. | | a | | Helichrysopsis Kirp. | | Asteraceae |
| Helichrysum Mill. | | a | | Helichrysum Mill. | | Asteraceae |
| Heliocauta Humphries | | a | | Heliocauta Humphries | | Asteraceae |
| Heliomeris Nutt. | | a | | Heliomeris Nutt. | | Asteraceae |
| Heliopsis Pers. | | a | | Heliopsis Pers. | | Asteraceae |
| Helipterum DC. | | a | | Helipterum DC. | | Asteraceae |
| Helipterum DC. ex Lindl. | Syncarpha DC. | | | Helipterum DC. ex Lindl. | Syncarpha DC. | Asteraceae |
| Helminthia Juss. | Picris L. | | | Helminthia Juss. | Picris L. | Asteraceae |
| Helminthotheca Zinn | | a | | Helminthotheca Zinn | | Asteraceae |
| Helogyne Nutt. | | a | | Helogyne Nutt. | | Asteraceae |
| Hemiachyris DC. | Gutierrezia Lag. | | | Hemiachyris DC. | Gutierrezia Lag. | Asteraceae |
| Hemisteptia Bunge ex Fisch. & C. A. Mey. | | a | | Hemisteptia Bunge ex Fisch. & C. A. Mey. | | Asteraceae |
| Hemizonella (A. Gray) A. Gray | | a | | Hemizonella (A. Gray) A. Gray | | Asteraceae |
| Hemizonia DC. | | a | | Hemizonia DC. | | Asteraceae |
| Henricia Cass. | Psiadia Jacq. ex Willd. | | | Henricia Cass. | Psiadia Jacq. ex Willd. | Asteraceae |
| Henricksonia B. L. Turner | | a | | Henricksonia B. L. Turner | | Asteraceae |
| Heptanthus Griseb. | | a | | Heptanthus Griseb. | | Asteraceae |
| Herderia Cass. | | a | | Herderia Cass. | | Asteraceae |
| Herodotia Urb. & Ekman | | a | | Herodotia Urb. & Ekman | | Asteraceae |
| Herreranthus B. Nord. | | a | | Herreranthus B. Nord. | | Asteraceae |
| Herrickia Wooton & Standl. | | a | | Herrickia Wooton & Standl. | | Asteraceae |
| Hertia Less. | | a | | Hertia Less. | | Asteraceae |
| Hesperevax (A. Gray) A. Gray | | a | | Hesperevax (A. Gray) A. Gray | | Asteraceae |
| Hesperodoria Greene | | a | | Hesperodoria Greene | | Asteraceae |
| Hesperomannia A. Gray | | a | | Hesperomannia A. Gray | | Asteraceae |
| Hesperoseris Skottsb. | Dendroseris D. Don | | | Hesperoseris Skottsb. | Dendroseris D. Don | Asteraceae |
| Heteracia Fisch. & C. A. Mey. | | a | | Heteracia Fisch. & C. A. Mey. | | Asteraceae |
| Heteranthemis Schott | | a | | Heteranthemis Schott | | Asteraceae |
| Heterocoma DC. | | a | | Heterocoma DC. | | Asteraceae |
| Heterocondylus R. M. King & H. Rob. | | a | | Heterocondylus R. M. King & H. Rob. | | Asteraceae |
| Heterocypsela H. Rob. | | a | | Heterocypsela H. Rob. | | Asteraceae |
| Heteroderis (Bunge) Boiss. | | a | | Heteroderis (Bunge) Boiss. | | Asteraceae |
| Heterochaeta DC. | Aster L. | | | Heterochaeta DC. | Aster L. | Asteraceae |
| Heterolepis Cass. | | a | | Heterolepis Cass. | | Asteraceae |
| Heteromera Pomel | | a | | Heteromera Pomel | | Asteraceae |
| Heteromma Benth. | | a | | Heteromma Benth. | | Asteraceae |
| Heteropappus Less. | Aster L. | | | Heteropappus Less. | Aster L. | Asteraceae |
| Heteroplexis C. C. Chang | | a | | Heteroplexis C. C. Chang | | Asteraceae |
| Heterorhachis Sch. Bip. ex Walp. | | a | | Heterorhachis Sch. Bip. ex Walp. | | Asteraceae |
| Heterosperma Cav. | | a | | Heterosperma Cav. | | Asteraceae |
| Heterothalamus Less. | | a | | Heterothalamus Less. | | Asteraceae |
| Heterotheca Cass. | | a | | Heterotheca Cass. | | Asteraceae |
| Heywoodiella Svent. & Bramwell | Hypochaeris L. | | | Heywoodiella Svent. & Bramwell | Hypochaeris L. | Asteraceae |
| Hidalgoa La Llave | | a | | Hidalgoa La Llave | | Asteraceae |
| Hieracium L. | | a | | Hieracium L. | | Asteraceae |
| Hilliardia B. Nord. | | a | | Hilliardia B. Nord. | | Asteraceae |
| Hilliardiella H. Rob. | | a | | Hilliardiella H. Rob. | | Asteraceae |
| Himalaiella Raab-Straube | | a | | Himalaiella Raab-Straube | | Asteraceae |
| Hinterhubera Sch. Bip. ex Wedd. | | a | | Hinterhubera Sch. Bip. ex Wedd. | | Asteraceae |
| Hippia L. | | a | | Hippia L. | | Asteraceae |
| Hippolytia Poljakov | | a | | Hippolytia Poljakov | | Asteraceae |
| Hirpicium Cass. | | a | | Hirpicium Cass. | | Asteraceae |
| Hirschia Baker | Iphiona Cass. | | | Hirschia Baker | Iphiona Cass. | Asteraceae |
| Hirtellina Cass. | Staehelina L. | | | Hirtellina Cass. | Staehelina L. | Asteraceae |
| Hispidella Barnadez ex Lam. | | a | | Hispidella Barnadez ex Lam. | | Asteraceae |
| Hoehnelia Schweinf. | Ethulia L. f. | | | Hoehnelia Schweinf. | Ethulia L. f. | Asteraceae |
| Hoehnephytum Cabrera | | a | | Hoehnephytum Cabrera | | Asteraceae |
| Hoffmannanthus H. Rob. et al. | | a | | Hoffmannanthus H. Rob. et al. | | Asteraceae |
| Hoffmanniella Schltr. ex Lawalrée | | a | | Hoffmanniella Schltr. ex Lawalrée | | Asteraceae |
| Hofmeisteria Walp. | | a | | Hofmeisteria Walp. | | Asteraceae |
| Hochstetteria DC. | | a | | Hochstetteria DC. | | Asteraceae |
| Holocarpha Greene | | a | | Holocarpha Greene | | Asteraceae |
| Holocheilus Cass. | | a | | Holocheilus Cass. | | Asteraceae |
| Hololeion Kitam. | | a | | Hololeion Kitam. | | Asteraceae |
| Hololepis DC. | | a | | Hololepis DC. | | Asteraceae |
| Holoschkuhria H. Rob. | | a | | Holoschkuhria H. Rob. | | Asteraceae |
| Holozonia Greene | | a | | Holozonia Greene | | Asteraceae |
| Homognaphalium Kirp. | Gnaphalium L. | | | Homognaphalium Kirp. | Gnaphalium L. | Asteraceae |
| Homogyne Cass. | | a | | Homogyne Cass. | | Asteraceae |
| Homopappus Nutt. | Haplopappus Cass. | | | Homopappus Nutt. | Haplopappus Cass. | Asteraceae |
| Hoorebekia Cornel. | Grindelia Willd. | | | Hoorebekia Cornel. | Grindelia Willd. | Asteraceae |
| Hoplophyllum DC. | | a | | Hoplophyllum DC. | | Asteraceae |
| Huarpea Cabrera | | a | | Huarpea Cabrera | | Asteraceae |
| Huberopappus Pruski | | a | | Huberopappus Pruski | | Asteraceae |
| Hubertia Bory | | a | | Hubertia Bory | | Asteraceae |
| Hughesia R. M. King & H. Rob. | | a | | Hughesia R. M. King & H. Rob. | | Asteraceae |
| Hullsia P. S. Short | | a | | Hullsia P. S. Short | | Asteraceae |
| Hulsea Torr. & A. Gray | | a | | Hulsea Torr. & A. Gray | | Asteraceae |
| Hulteniella Tzvelev | | a | | Hulteniella Tzvelev | | Asteraceae |
| Humbertacalia C. Jeffrey | | a | | Humbertacalia C. Jeffrey | | Asteraceae |
| Humea Sm. | Calomeria Vent. | | | Humea Sm. | Calomeria Vent. | Asteraceae |
| Humeocline Anderb. | | a | | Humeocline Anderb. | | Asteraceae |
| Hyalis D. Don ex Hook. & Arn. | | a | | Hyalis D. Don ex Hook. & Arn. | | Asteraceae |
| Hyalochaete Dittrich & Rech. f. | Jurinea Cass. | | | Hyalochaete Dittrich & Rech. f. | Jurinea Cass. | Asteraceae |
| Hyalochlamys A. Gray | | a | | Hyalochlamys A. Gray | | Asteraceae |
| Hyaloseris Griseb. | | a | | Hyaloseris Griseb. | | Asteraceae |
| Hyalosperma Steetz | | a | | Hyalosperma Steetz | | Asteraceae |
| Hybridella Cass. | | a | | Hybridella Cass. | | Asteraceae |
| Hydrodyssodia B. L. Turner | Hydropectis Rydb. | | | Hydrodyssodia B. L. Turner | Hydropectis Rydb. | Asteraceae |
| Hydroidea P. O. Karis | | a | | Hydroidea P. O. Karis | | Asteraceae |
| Hydropectis Rydb. | | a | | Hydropectis Rydb. | | Asteraceae |
| Hymenatherum Cass. | Thymophylla Lag. | | | Hymenatherum Cass. | Thymophylla Lag. | Asteraceae |
| Hymenocephalus Jaub. & Spach | | a | | Hymenocephalus Jaub. & Spach | | Asteraceae |
| Hymenoclea Torr. & A. Gray | Ambrosia L. | | | Hymenoclea Torr. & A. Gray | Ambrosia L. | Asteraceae |
| Hymenolepis Cass. | | a | | Hymenolepis Cass. | | Asteraceae |
| Hymenonema Cass. | | a | | Hymenonema Cass. | | Asteraceae |
| Hymenopappus LʼHér. | | a | | Hymenopappus LʼHér. | | Asteraceae |
| Hymenostemma Kunze ex Willk. | | a | | Hymenostemma Kunze ex Willk. | | Asteraceae |
| Hymenostephium Benth. | | a | | Hymenostephium Benth. | | Asteraceae |
| Hymenothrix A. Gray | | a | | Hymenothrix A. Gray | | Asteraceae |
| Hymenoxys Cass. | | a | | Hymenoxys Cass. | | Asteraceae |
| Hyoseris L. | | a | | Hyoseris L. | | Asteraceae |
| Hypacanthium Juz. | | a | | Hypacanthium Juz. | | Asteraceae |
| Hypelichrysum Kirp. | Pseudognaphalium Kirp. | | | Hypelichrysum Kirp. | Pseudognaphalium Kirp. | Asteraceae |
| Hypericophyllum Steetz | | a | | Hypericophyllum Steetz | | Asteraceae |
| Hypochaeris L. | | a | | Hypochaeris L. | | Asteraceae |
| Hypochoeris L., orth. var. | Hypochaeris L. | | | Hypochoeris L., orth. var. | Hypochaeris L. | Asteraceae |
| Hysterionica Willd. | Erigeron L. | | | Hysterionica Willd. | Erigeron L. | Asteraceae |
| Hystrichophora Mattf. | | a | | Hystrichophora Mattf. | | Asteraceae |
| Chacoa R. M. King & H. Rob. | | a | | Chacoa R. M. King & H. Rob. | | Asteraceae |
| Chaenactis DC. | | a | | Chaenactis DC. | | Asteraceae |
| Chaenocephalus Griseb. | Verbesina L. | | | Chaenocephalus Griseb. | Verbesina L. | Asteraceae |
| Chaetadelpha A. Gray ex S. Watson | | a | | Chaetadelpha A. Gray ex S. Watson | | Asteraceae |
| Chaetanthera Ruiz & Pav. | | a | | Chaetanthera Ruiz & Pav. | | Asteraceae |
| Chaetopappa DC. | | a | | Chaetopappa DC. | | Asteraceae |
| Chaetoseris C. Shih | Melanoseris Decne. | | | Chaetoseris C. Shih | Melanoseris Decne. | Asteraceae |
| Chaetospira S. F. Blake | Pseudelephantopus Rohr | | | Chaetospira S. F. Blake | Pseudelephantopus Rohr | Asteraceae |
| Chaetymenia Hook. & Arn. | | a | | Chaetymenia Hook. & Arn. | | Asteraceae |
| Chamaegeron Schrenk | | a | | Chamaegeron Schrenk | | Asteraceae |
| Chamaechaenactis Rydb. | | a | | Chamaechaenactis Rydb. | | Asteraceae |
| Chamaeleon Cass. | | a | | Chamaeleon Cass. | | Asteraceae |
| Chamaemelum Mill. | | a | | Chamaemelum Mill. | | Asteraceae |
| Chamaepeuce DC. | Ptilostemon Cass. | | | Chamaepeuce DC. | Ptilostemon Cass. | Asteraceae |
| Chamaepus Wagenitz | | a | | Chamaepus Wagenitz | | Asteraceae |
| Chamartemisia Rydb. | Artemisia L. | | | Chamartemisia Rydb. | Artemisia L. | Asteraceae |
| Chamissomneia Kuntze | Schlechtendalia Less. | | | Chamissomneia Kuntze | Schlechtendalia Less. | Asteraceae |
| Chamomilla Gray | Matricaria L. | | | Chamomilla Gray | Matricaria L. | Asteraceae |
| Chaptalia Vent. | | a | | Chaptalia Vent. | | Asteraceae |
| Charadranaetes Janovec & H. Rob. | | a | | Charadranaetes Janovec & H. Rob. | | Asteraceae |
| Chardinia Desf. | | a | | Chardinia Desf. | | Asteraceae |
| Charieis Cass. | Felicia Cass. | | | Charieis Cass. | Felicia Cass. | Asteraceae |
| Chartolepis Cass. | Centaurea L. | | | Chartolepis Cass. | Centaurea L. | Asteraceae |
| Cheiroloma F. Muell. | Calotis R. Br. | | | Cheiroloma F. Muell. | Calotis R. Br. | Asteraceae |
| Cheirolophus Cass. | | a | | Cheirolophus Cass. | | Asteraceae |
| Chersodoma Phil. | | a | | Chersodoma Phil. | | Asteraceae |
| Chevreulia Cass. | | a | | Chevreulia Cass. | | Asteraceae |
| Chihuahuana Urbatsch & R. P. Roberts | | a | | Chihuahuana Urbatsch & R. P. Roberts | | Asteraceae |
| Chiliadenus Cass. | | a | | Chiliadenus Cass. | | Asteraceae |
| Chiliocephalum Benth. | | a | | Chiliocephalum Benth. | | Asteraceae |
| Chiliophyllum Phil. | | a | | Chiliophyllum Phil. | | Asteraceae |
| Chiliotrichiopsis Cabrera | | a | | Chiliotrichiopsis Cabrera | | Asteraceae |
| Chiliotrichum Cass. | | a | | Chiliotrichum Cass. | | Asteraceae |
| Chimantaea Maguire et al. | | a | | Chimantaea Maguire et al. | | Asteraceae |
| Chionolaena DC. | | a | | Chionolaena DC. | | Asteraceae |
| Chionopappus Benth. | | a | | Chionopappus Benth. | | Asteraceae |
| Chlamydites J. R. Drumm. | Aster L. | | | Chlamydites J. R. Drumm. | Aster L. | Asteraceae |
| Chlamydophora Ehrenb. ex Less. | | a | | Chlamydophora Ehrenb. ex Less. | | Asteraceae |
| Chloracantha G. L. Nesom et al. | | a | | Chloracantha G. L. Nesom et al. | | Asteraceae |
| Chondrilla L. | | a | | Chondrilla L. | | Asteraceae |
| Chondropyxis D. A. Cooke | | a | | Chondropyxis D. A. Cooke | | Asteraceae |
| Chorisis DC. | Ixeris (Cass.) Cass. | | | Chorisis DC. | Ixeris (Cass.) Cass. | Asteraceae |
| Chorisiva (A. Gray) Rydb. | | a | | Chorisiva (A. Gray) Rydb. | | Asteraceae |
| Chresta Vell. ex DC. | | a | | Chresta Vell. ex DC. | | Asteraceae |
| Chromolaena DC. | | a | | Chromolaena DC. | | Asteraceae |
| Chromolepis Benth. | | a | | Chromolepis Benth. | | Asteraceae |
| Chronopappus DC. | | a | | Chronopappus DC. | | Asteraceae |
| Chrysactinia A. Gray | | a | | Chrysactinia A. Gray | | Asteraceae |
| Chrysactinium (Kunth) Wedd. | | a | | Chrysactinium (Kunth) Wedd. | | Asteraceae |
| Chrysanthellum Rich. | | a | | Chrysanthellum Rich. | | Asteraceae |
| Chrysanthemoides Fabr. | | a | | Chrysanthemoides Fabr. | | Asteraceae |
| Chrysanthemum L. | | a | | Chrysanthemum L. | | Asteraceae |
| Chrysanthemum L. sect. Ajania | | a | i | Chrysanthemum L. sect. Ajania | | Asteraceae |
| Chrysanthemum L. sect. Arctanthemum | | a | i | Chrysanthemum L. sect. Arctanthemum | | Asteraceae |
| Chrysanthemum L. sect. Chrysanthemum | | a | i | Chrysanthemum L. sect. Chrysanthemum | | Asteraceae |
| Chrysanthoglossum B. H. Wilcox et al. | | a | | Chrysanthoglossum B. H. Wilcox et al. | | Asteraceae |
| Chryselium Urtubey & S. E. Freire | | a | | Chryselium Urtubey & S. E. Freire | | Asteraceae |
| Chrysocephalum Walp. | | a | | Chrysocephalum Walp. | | Asteraceae |
| Chrysocoma L. | | a | | Chrysocoma L. | | Asteraceae |
| Chrysocoryne Endl. | Gnephosis Cass. | | | Chrysocoryne Endl. | Gnephosis Cass. | Asteraceae |
| Chrysogonum L. | | a | | Chrysogonum L. | | Asteraceae |
| Chrysolaena H. Rob. | | a | | Chrysolaena H. Rob. | | Asteraceae |
| Chrysoma Nutt. | | a | | Chrysoma Nutt. | | Asteraceae |
| Chrysopappus Takht. | Centaurea L. | | | Chrysopappus Takht. | Centaurea L. | Asteraceae |
| Chrysophtalmum Sch. Bip. ex Walp., orth. var. | Chrysophthalmum Sch. Bip. | | | Chrysophtalmum Sch. Bip. ex Walp., orth. var. | Chrysophthalmum Sch. Bip. | Asteraceae |
| Chrysophthalmum Sch. Bip. | | a | | Chrysophthalmum Sch. Bip. | | Asteraceae |
| Chrysoprenanthes (Sch. Bip.) Bramwell | | a | | Chrysoprenanthes (Sch. Bip.) Bramwell | | Asteraceae |
| Chrysopsis (Nutt.) Elliott | | a | | Chrysopsis (Nutt.) Elliott | | Asteraceae |
| Chrysothamnus Nutt. | | a | | Chrysothamnus Nutt. | | Asteraceae |
| Chthonocephalus Steetz | | a | | Chthonocephalus Steetz | | Asteraceae |
| Chucoa Cabrera | Onoseris Willd. | | | Chucoa Cabrera | Onoseris Willd. | Asteraceae |
| Chuquiraga Juss. | | a | | Chuquiraga Juss. | | Asteraceae |
| Ianthopappus Rogue & D. J. N. Hind | | a | | Ianthopappus Rogue & D. J. N. Hind | | Asteraceae |
| Idiopappus H. Rob. & Panero | | a | | Idiopappus H. Rob. & Panero | | Asteraceae |
| Idiothamnus R. M. King & H. Rob. | | a | | Idiothamnus R. M. King & H. Rob. | | Asteraceae |
| Ifloga Cass. | | a | | Ifloga Cass. | | Asteraceae |
| Ighermia Wiklund | Asteriscus Mill. | | | Ighermia Wiklund | Asteriscus Mill. | Asteraceae |
| Ignurbia B. Nord. | | a | | Ignurbia B. Nord. | | Asteraceae |
| Ichthyothere Mart. | | a | | Ichthyothere Mart. | | Asteraceae |
| Iltisia S. F. Blake | Microspermum Lag. | | | Iltisia S. F. Blake | Microspermum Lag. | Asteraceae |
| Imeria R. M. King & H. Rob. | | a | | Imeria R. M. King & H. Rob. | | Asteraceae |
| Inezia E. Phillips | | a | | Inezia E. Phillips | | Asteraceae |
| Inula L. | | a | | Inula L. | | Asteraceae |
| Inulanthera Källersjö | | a | | Inulanthera Källersjö | | Asteraceae |
| Inuloides B. Nord. | | a | | Inuloides B. Nord. | | Asteraceae |
| Inulopsis O. Hoffm. | | a | | Inulopsis O. Hoffm. | | Asteraceae |
| Inyonia M. E. Jones | Psathyrotes A. Gray | | | Inyonia M. E. Jones | Psathyrotes A. Gray | Asteraceae |
| Io B. Nord. | | a | | Io B. Nord. | | Asteraceae |
| Iocenes B. Nord. | Senecio L. | | | Iocenes B. Nord. | Senecio L. | Asteraceae |
| Iodocephalopsis Bunwong & H. Rob. | | a | | Iodocephalopsis Bunwong & H. Rob. | | Asteraceae |
| Iodocephalus Thorel ex Gagnep. | | a | | Iodocephalus Thorel ex Gagnep. | | Asteraceae |
| Iogeton Strother | | a | | Iogeton Strother | | Asteraceae |
| Ionactis Greene | | a | | Ionactis Greene | | Asteraceae |
| Iostephane Benth. | | a | | Iostephane Benth. | | Asteraceae |
| Iotasperma G. L. Nesom | | a | | Iotasperma G. L. Nesom | | Asteraceae |
| Iphiona Cass. | | a | | Iphiona Cass. | | Asteraceae |
| Iphionopsis Anderb. | | a | | Iphionopsis Anderb. | | Asteraceae |
| Iranecio B. Nord. | | a | | Iranecio B. Nord. | | Asteraceae |
| Irwinia G. M. Barroso | | a | | Irwinia G. M. Barroso | | Asteraceae |
| Ischnea F. Muell. | | a | | Ischnea F. Muell. | | Asteraceae |
| Ismelia Cass. | Glebionis Cass. | | | Ismelia Cass. | Glebionis Cass. | Asteraceae |
| Isocarpha R. Br. | | a | | Isocarpha R. Br. | | Asteraceae |
| Isocoma Nutt. | | a | | Isocoma Nutt. | | Asteraceae |
| Isoetopsis Turcz. | | a | | Isoetopsis Turcz. | | Asteraceae |
| Isopappus Torr. & A. Gray | Croptilon Raf. | | | Isopappus Torr. & A. Gray | Croptilon Raf. | Asteraceae |
| Isostigma Less. | | a | | Isostigma Less. | | Asteraceae |
| Iva L. | | a | | Iva L. | | Asteraceae |
| Ixeridium (A. Gray) Tzvelev | | a | | Ixeridium (A. Gray) Tzvelev | | Asteraceae |
| Ixeris (Cass.) Cass. | | a | | Ixeris (Cass.) Cass. | | Asteraceae |
| Ixiochlamys F. Muell. & Sond. | | a | | Ixiochlamys F. Muell. & Sond. | | Asteraceae |
| Ixiolaena Benth. | | a | | Ixiolaena Benth. | | Asteraceae |
| Ixodia R. Br. | | a | | Ixodia R. Br. | | Asteraceae |
| Jacea Mill. | Centaurea L. | | | Jacea Mill. | Centaurea L. | Asteraceae |
| Jacmaia B. Nord. | | a | | Jacmaia B. Nord. | | Asteraceae |
| Jacobaea Mill. | | a | | Jacobaea Mill. | | Asteraceae |
| Jaegeria Kunth | | a | | Jaegeria Kunth | | Asteraceae |
| Jalcophila M. O. Dillon & Sagást. | | a | | Jalcophila M. O. Dillon & Sagást. | | Asteraceae |
| Jaliscoa S. Watson | | a | | Jaliscoa S. Watson | | Asteraceae |
| Jamesianthus S. F. Blake & Sherff | | a | | Jamesianthus S. F. Blake & Sherff | | Asteraceae |
| Japonicalia C. Ren & Q. E. Yang | | a | | Japonicalia C. Ren & Q. E. Yang | | Asteraceae |
| Jaramilloa R. M. King & H. Rob. | | a | | Jaramilloa R. M. King & H. Rob. | | Asteraceae |
| Jasonia (Cass.) Cass. | | a | | Jasonia (Cass.) Cass. | | Asteraceae |
| Jaumea Pers. | | a | | Jaumea Pers. | | Asteraceae |
| Jefea Strother | | a | | Jefea Strother | | Asteraceae |
| Jeffreya Wild | | a | | Jeffreya Wild | | Asteraceae |
| Jeffreycia H. Rob. et al. | | a | | Jeffreycia H. Rob. et al. | | Asteraceae |
| Jensia B. G. Baldwin | | a | | Jensia B. G. Baldwin | | Asteraceae |
| Jessea H. Rob. & Cuatrec. | | a | | Jessea H. Rob. & Cuatrec. | | Asteraceae |
| Johannia Willd. | Chuquiraga Juss. | | | Johannia Willd. | Chuquiraga Juss. | Asteraceae |
| Joseanthus H. Rob. | | a | | Joseanthus H. Rob. | | Asteraceae |
| Jungia L. f. | | a | | Jungia L. f. | | Asteraceae |
| Jurinea Cass. | | a | | Jurinea Cass. | | Asteraceae |
| Jurinella Jaub. & Spach | Jurinea Cass. | | | Jurinella Jaub. & Spach | Jurinea Cass. | Asteraceae |
| Kalimeris (Cass.) Cass. | Aster L. | | | Kalimeris (Cass.) Cass. | Aster L. | Asteraceae |
| Kanimia Gardner | Mikania Willd. | | | Kanimia Gardner | Mikania Willd. | Asteraceae |
| Karelinia Less. | | a | | Karelinia Less. | | Asteraceae |
| Karvandarina Rech. f. | | a | | Karvandarina Rech. f. | | Asteraceae |
| Kaschgaria Poljakov | | a | | Kaschgaria Poljakov | | Asteraceae |
| Katinasia Bonifacino | | a | | Katinasia Bonifacino | | Asteraceae |
| Kaunia R. M. King & H. Rob. | | a | | Kaunia R. M. King & H. Rob. | | Asteraceae |
| Kentrophyllum Neck. ex DC. | Carthamus L. | | | Kentrophyllum Neck. ex DC. | Carthamus L. | Asteraceae |
| Keysseria Lauterb. | | a | | Keysseria Lauterb. | | Asteraceae |
| Khasianthus H. Rob. & Skvarla | | a | | Khasianthus H. Rob. & Skvarla | | Asteraceae |
| Kinghamia C. Jeffrey | | a | | Kinghamia C. Jeffrey | | Asteraceae |
| Kingianthus H. Rob. | | a | | Kingianthus H. Rob. | | Asteraceae |
| Kippistia F. Muell. | | a | | Kippistia F. Muell. | | Asteraceae |
| Kirkianella Allan | | a | | Kirkianella Allan | | Asteraceae |
| Kitamuraea Rauschert | Aster L. | | | Kitamuraea Rauschert | Aster L. | Asteraceae |
| Kitamuraster Soják | Aster L. | | | Kitamuraster Soják | Aster L. | Asteraceae |
| Klasea Cass. | | a | | Klasea Cass. | | Asteraceae |
| Klaseopsis L. Martins | | a | | Klaseopsis L. Martins | | Asteraceae |
| Kleinia Mill. | | a | | Kleinia Mill. | | Asteraceae |
| Koanophyllon Arruda | | a | | Koanophyllon Arruda | | Asteraceae |
| Koanophyllum Arruda, orth. var. | Koanophyllon Arruda | | | Koanophyllum Arruda, orth. var. | Koanophyllon Arruda | Asteraceae |
| Koehneola Urb. | | a | | Koehneola Urb. | | Asteraceae |
| Koechlea Endl. | Ptilostemon Cass. | | | Koechlea Endl. | Ptilostemon Cass. | Asteraceae |
| Koelpinia Pall. | | a | | Koelpinia Pall. | | Asteraceae |
| Koyamacalia H. Rob. & Brettell | | a | | Koyamacalia H. Rob. & Brettell | | Asteraceae |
| Koyamasia H. Rob. | | a | | Koyamasia H. Rob. | | Asteraceae |
| Kremeria Durieu | Leucanthemum Mill. | | | Kremeria Durieu | Leucanthemum Mill. | Asteraceae |
| Krigia Schreb. | | a | | Krigia Schreb. | | Asteraceae |
| Kuhnia L. | Brickellia Elliott | | | Kuhnia L. | Brickellia Elliott | Asteraceae |
| Kurziella H. Rob. & Bunwong | | a | | Kurziella H. Rob. & Bunwong | | Asteraceae |
| Kyhosia B. G. Baldwin | | a | | Kyhosia B. G. Baldwin | | Asteraceae |
| Kyrsteniopsis R. M. King & H. Rob. | | a | | Kyrsteniopsis R. M. King & H. Rob. | | Asteraceae |
| Laciala Kuntze | Schizoptera Turcz. | | | Laciala Kuntze | Schizoptera Turcz. | Asteraceae |
| Lacinaria Hill | Liatris Gaertn. ex Schreb. | | | Lacinaria Hill | Liatris Gaertn. ex Schreb. | Asteraceae |
| Lactuca L. | | a | | Lactuca L. | | Asteraceae |
| Lactuca L. sect. Lactuca | | a | i | Lactuca L. sect. Lactuca | | Asteraceae |
| Lactuca L. sect. Lactucopsis | | a | i | Lactuca L. sect. Lactucopsis | | Asteraceae |
| Lactuca L. sect. Melanoseris | | a | i | Lactuca L. sect. Melanoseris | | Asteraceae |
| Lactuca L. sect. Micranthae | | a | i | Lactuca L. sect. Micranthae | | Asteraceae |
| Lactuca L. sect. Mulgedium | | a | i | Lactuca L. sect. Mulgedium | | Asteraceae |
| Lactuca L. sect. Phaenixopus | | a | i | Lactuca L. sect. Phaenixopus | | Asteraceae |
| Lactuca L. sect. Sororiae | | a | i | Lactuca L. sect. Sororiae | | Asteraceae |
| Lactuca L. sect. Tuberosae | | a | i | Lactuca L. sect. Tuberosae | | Asteraceae |
| Lactucella Nazarova | Lactuca L. | | | Lactucella Nazarova | Lactuca L. | Asteraceae |
| Lactucopsis Vis. & Pančić | Lactuca L. | | | Lactucopsis Vis. & Pančić | Lactuca L. | Asteraceae |
| Lactucosonchus (Sch. Bip.) Svent. | | a | | Lactucosonchus (Sch. Bip.) Svent. | | Asteraceae |
| Laennecia Cass. | | a | | Laennecia Cass. | | Asteraceae |
| Laestadia Kunth ex Less. | | a | | Laestadia Kunth ex Less. | | Asteraceae |
| Lagascea Cav. | | a | | Lagascea Cav. | | Asteraceae |
| Lagedium Soják | Lactuca L. | | | Lagedium Soják | Lactuca L. | Asteraceae |
| Lagenifera Cass., orth. var. | Lagenophora Cass. | | | Lagenifera Cass., orth. var. | Lagenophora Cass. | Asteraceae |
| Lagenithrix G. L. Nesom | Pappochroma Raf. | | | Lagenithrix G. L. Nesom | Pappochroma Raf. | Asteraceae |
| Lagenopappus G. L. Nesom | Pappochroma Raf. | | | Lagenopappus G. L. Nesom | Pappochroma Raf. | Asteraceae |
| Lagenophora Cass. | | a | | Lagenophora Cass. | | Asteraceae |
| Laggera Sch. Bip. ex Benth. & Hook. f. | | a | | Laggera Sch. Bip. ex Benth. & Hook. f. | | Asteraceae |
| Lagophylla Nutt. | | a | | Lagophylla Nutt. | | Asteraceae |
| Lagoseriopsis Kirp. | | a | | Lagoseriopsis Kirp. | | Asteraceae |
| Lagoseris M. Bieb. | Crepis L. | | | Lagoseris M. Bieb. | Crepis L. | Asteraceae |
| Lachanodes DC. | | a | | Lachanodes DC. | | Asteraceae |
| Lachnophyllum Bunge | | a | | Lachnophyllum Bunge | | Asteraceae |
| Lachnorhiza A. Rich. | | a | | Lachnorhiza A. Rich. | | Asteraceae |
| Lachnospermum Willd. | | a | | Lachnospermum Willd. | | Asteraceae |
| Lamottea Pomel | Carduncellus Adans. | | | Lamottea Pomel | Carduncellus Adans. | Asteraceae |
| Lamprachaenium Benth. | | a | | Lamprachaenium Benth. | | Asteraceae |
| Lamprocephalus B. Nord. | | a | | Lamprocephalus B. Nord. | | Asteraceae |
| Lampropappus (O. Hoffm.) H. Rob. | | a | | Lampropappus (O. Hoffm.) H. Rob. | | Asteraceae |
| Lamyropappus Knorring & Tamamsch. | | a | | Lamyropappus Knorring & Tamamsch. | | Asteraceae |
| Lamyropsis (Kharadze) Dittrich | | a | | Lamyropsis (Kharadze) Dittrich | | Asteraceae |
| Landtia Less. | Haplocarpha Less. | | | Landtia Less. | Haplocarpha Less. | Asteraceae |
| Langebergia Anderb. | | a | | Langebergia Anderb. | | Asteraceae |
| Lantanopsis C. Wright ex Griseb. | | a | | Lantanopsis C. Wright ex Griseb. | | Asteraceae |
| Laphamia A. Gray | Perityle Benth. | | | Laphamia A. Gray | Perityle Benth. | Asteraceae |
| Laphangium (Hilliard & B. L. Burtt) Tzvelev | Pseudognaphalium Kirp. | | | Laphangium (Hilliard & B. L. Burtt) Tzvelev | Pseudognaphalium Kirp. | Asteraceae |
| Lappa Scop. | Arctium L. | | | Lappa Scop. | Arctium L. | Asteraceae |
| Lapsana L. | | a | | Lapsana L. | | Asteraceae |
| Lapsanastrum Pak & K. Bremer | | a | | Lapsanastrum Pak & K. Bremer | | Asteraceae |
| Lasallea Greene | Aster L. | | | Lasallea Greene | Aster L. | Asteraceae |
| Lasianthaea DC. | | a | | Lasianthaea DC. | | Asteraceae |
| Lasiocephalus Willd. ex Schltdl. | Senecio L. | | | Lasiocephalus Willd. ex Schltdl. | Senecio L. | Asteraceae |
| Lasiocoma Bolus | Euryops (Cass.) Cass. | | | Lasiocoma Bolus | Euryops (Cass.) Cass. | Asteraceae |
| Lasiolaena R. M. King & H. Rob. | | a | | Lasiolaena R. M. King & H. Rob. | | Asteraceae |
| Lasiopogon Cass. | | a | | Lasiopogon Cass. | | Asteraceae |
| Lasiopus Cass. | Gerbera L. | | | Lasiopus Cass. | Gerbera L. | Asteraceae |
| Lasiospermum Lag. | | a | | Lasiospermum Lag. | | Asteraceae |
| Lasiospora Cass. | Scorzonera L. | | | Lasiospora Cass. | Scorzonera L. | Asteraceae |
| Lasthenia Cass. | | a | | Lasthenia Cass. | | Asteraceae |
| Launaea Cass. | | a | | Launaea Cass. | | Asteraceae |
| Lawrencella Lindl. | | a | | Lawrencella Lindl. | | Asteraceae |
| Layia Hook. & Arn. ex DC. | | a | | Layia Hook. & Arn. ex DC. | | Asteraceae |
| Lebetina Cass. | Adenophyllum Pers. | | | Lebetina Cass. | Adenophyllum Pers. | Asteraceae |
| Lecocarpus Decne. | | a | | Lecocarpus Decne. | | Asteraceae |
| Leibnitzia Cass. | | a | | Leibnitzia Cass. | | Asteraceae |
| Leiboldia Schltdl. ex Gleason | | a | | Leiboldia Schltdl. ex Gleason | | Asteraceae |
| Leiocarpa Paul G. Wilson | | a | | Leiocarpa Paul G. Wilson | | Asteraceae |
| Lembertia Greene | Monolopia DC. | | | Lembertia Greene | Monolopia DC. | Asteraceae |
| Lemooria P. S. Short | | a | | Lemooria P. S. Short | | Asteraceae |
| Leonis B. Nord. | | a | | Leonis B. Nord. | | Asteraceae |
| Leontodon L. | | a | | Leontodon L. | | Asteraceae |
| Leontonyx Cass. | Helichrysum Mill. | | | Leontonyx Cass. | Helichrysum Mill. | Asteraceae |
| Leontopodium R. Br. ex Cass. | | a | | Leontopodium R. Br. ex Cass. | | Asteraceae |
| Lepachys Raf. | Ratibida Raf. | | | Lepachys Raf. | Ratibida Raf. | Asteraceae |
| Lepidaploa (Cass.) Cass. | | a | | Lepidaploa (Cass.) Cass. | | Asteraceae |
| Lepidesmia Klatt | | a | | Lepidesmia Klatt | | Asteraceae |
| Lepidolopha C. Winkl. | | a | | Lepidolopha C. Winkl. | | Asteraceae |
| Lepidolopsis Poljakov | | a | | Lepidolopsis Poljakov | | Asteraceae |
| Lepidonia S. F. Blake | | a | | Lepidonia S. F. Blake | | Asteraceae |
| Lepidophorum Neck. ex Cass. | | a | | Lepidophorum Neck. ex Cass. | | Asteraceae |
| Lepidophyllum Cass. | | a | | Lepidophyllum Cass. | | Asteraceae |
| Lepidospartum (A. Gray) A. Gray | | a | | Lepidospartum (A. Gray) A. Gray | | Asteraceae |
| Lepidostephium Oliv. | | a | | Lepidostephium Oliv. | | Asteraceae |
| Leptinella Cass. | | a | | Leptinella Cass. | | Asteraceae |
| Leptocarpha DC. | | a | | Leptocarpha DC. | | Asteraceae |
| Leptoclinium (Nutt.) Benth. | | a | | Leptoclinium (Nutt.) Benth. | | Asteraceae |
| Leptopharynx Rydb. | Perityle Benth. | | | Leptopharynx Rydb. | Perityle Benth. | Asteraceae |
| Leptorhynchos Less. | | a | | Leptorhynchos Less. | | Asteraceae |
| Leptoseris Nutt. | Malacothrix DC. | | | Leptoseris Nutt. | Malacothrix DC. | Asteraceae |
| Leptostelma D. Don | Erigeron L. | | | Leptostelma D. Don | Erigeron L. | Asteraceae |
| Leptosyne DC. | Coreopsis L. | | | Leptosyne DC. | Coreopsis L. | Asteraceae |
| Leptotriche Turcz. | | a | | Leptotriche Turcz. | | Asteraceae |
| Lescaillea Griseb. | | a | | Lescaillea Griseb. | | Asteraceae |
| Lessingia Cham. | | a | | Lessingia Cham. | | Asteraceae |
| Lessingianthus H. Rob. | | a | | Lessingianthus H. Rob. | | Asteraceae |
| Leto Phil. | Helogyne Nutt. | | | Leto Phil. | Helogyne Nutt. | Asteraceae |
| Leucactinia Rydb. | | a | | Leucactinia Rydb. | | Asteraceae |
| Leucampyx A. Gray ex Benth. | Hymenopappus LʼHér. | | | Leucampyx A. Gray ex Benth. | Hymenopappus LʼHér. | Asteraceae |
| Leucanthemella Tzvelev | | a | | Leucanthemella Tzvelev | | Asteraceae |
| Leucanthemopsis (Giroux) Heywood | | a | | Leucanthemopsis (Giroux) Heywood | | Asteraceae |
| Leucanthemum Mill. | | a | | Leucanthemum Mill. | | Asteraceae |
| Leucelene Greene | Chaetopappa DC. | | | Leucelene Greene | Chaetopappa DC. | Asteraceae |
| Leuciva Rydb. | | a | | Leuciva Rydb. | | Asteraceae |
| Leucoblepharis Arn. | | a | | Leucoblepharis Arn. | | Asteraceae |
| Leucocyclus Boiss. | Achillea L. | | | Leucocyclus Boiss. | Achillea L. | Asteraceae |
| Leucogenes Beauverd | | a | | Leucogenes Beauverd | | Asteraceae |
| Leucoglossum B. H. Wilcox et al. | Mauranthemum Vogt & Oberpr. | | | Leucoglossum B. H. Wilcox et al. | Mauranthemum Vogt & Oberpr. | Asteraceae |
| Leucochrysum Paul G. Wilson | | a | | Leucochrysum Paul G. Wilson | | Asteraceae |
| Leucomeris D. Don | | a | | Leucomeris D. Don | | Asteraceae |
| Leucopholis Gardner | Chionolaena DC. | | | Leucopholis Gardner | Chionolaena DC. | Asteraceae |
| Leucophyta R. Br. | | a | | Leucophyta R. Br. | | Asteraceae |
| Leucopsidium Charpent. ex DC. | Erigeron L. | | | Leucopsidium Charpent. ex DC. | Erigeron L. | Asteraceae |
| Leucopsis (DC.) Baker | Noticastrum DC. | | | Leucopsis (DC.) Baker | Noticastrum DC. | Asteraceae |
| Leucoptera B. Nord. | | a | | Leucoptera B. Nord. | | Asteraceae |
| Leucoseris Nutt. | Malacothrix DC. | | | Leucoseris Nutt. | Malacothrix DC. | Asteraceae |
| Leucosyris Greene | Chloracantha G. L. Nesom et al. | | | Leucosyris Greene | Chloracantha G. L. Nesom et al. | Asteraceae |
| Leucheria Lag. | | a | | Leucheria Lag. | | Asteraceae |
| Leunisia Phil. | | a | | Leunisia Phil. | | Asteraceae |
| Leuzea DC. | Rhaponticum Ludw. | | | Leuzea DC. | Rhaponticum Ludw. | Asteraceae |
| Leveillea Vaniot | Blumea DC. | | | Leveillea Vaniot | Blumea DC. | Asteraceae |
| Leysera L. | | a | | Leysera L. | | Asteraceae |
| Liabellum Rydb. | Sinclairia Hook. & Arn. | | | Liabellum Rydb. | Sinclairia Hook. & Arn. | Asteraceae |
| Liabum Adans. | | a | | Liabum Adans. | | Asteraceae |
| Liatris Gaertn. ex Schreb. | | a | | Liatris Gaertn. ex Schreb. | | Asteraceae |
| Libanothamnus Ernst | | a | | Libanothamnus Ernst | | Asteraceae |
| Lidbeckia P. J. Bergius | | a | | Lidbeckia P. J. Bergius | | Asteraceae |
| Lifago Schweinf. & Muschl. | | a | | Lifago Schweinf. & Muschl. | | Asteraceae |
| Ligularia Cass. | | a | | Ligularia Cass. | | Asteraceae |
| Ligulariopsis Y. L. Chen | | a | | Ligulariopsis Y. L. Chen | | Asteraceae |
| Limbarda Adans. | | a | | Limbarda Adans. | | Asteraceae |
| Lindheimera A. Gray & Engelm. | | a | | Lindheimera A. Gray & Engelm. | | Asteraceae |
| Linosyris Cass. | Aster L. | | | Linosyris Cass. | Aster L. | Asteraceae |
| Linzia Sch. Bip. ex Walp. | | a | | Linzia Sch. Bip. ex Walp. | | Asteraceae |
| Lipochaeta DC. | | a | | Lipochaeta DC. | | Asteraceae |
| Lipschitzia Zaika et al. | | a | | Lipschitzia Zaika et al. | | Asteraceae |
| Lipschitziella Kamelin | | a | | Lipschitziella Kamelin | | Asteraceae |
| Lipskyella Juz. | Cousinia Cass. | | | Lipskyella Juz. | Cousinia Cass. | Asteraceae |
| Litogyne Harv. | | a | | Litogyne Harv. | | Asteraceae |
| Litothamnus R. M. King & H. Rob. | | a | | Litothamnus R. M. King & H. Rob. | | Asteraceae |
| Litrisa Small | | a | | Litrisa Small | | Asteraceae |
| Llerasia Triana | | a | | Llerasia Triana | | Asteraceae |
| Logfia Cass. | | a | | Logfia Cass. | | Asteraceae |
| Lomanthus B. Nord. & Pelser | | a | | Lomanthus B. Nord. & Pelser | | Asteraceae |
| Lomatozona Baker | | a | | Lomatozona Baker | | Asteraceae |
| Lonas Adans. | | a | | Lonas Adans. | | Asteraceae |
| Lopholaena DC. | | a | | Lopholaena DC. | | Asteraceae |
| Lophopappus Rusby | | a | | Lophopappus Rusby | | Asteraceae |
| Lorandersonia Urbatsch et al. | | a | | Lorandersonia Urbatsch et al. | | Asteraceae |
| Lordhowea B. Nord. | | a | | Lordhowea B. Nord. | | Asteraceae |
| Lorentzianthus R. M. King & H. Rob. | | a | | Lorentzianthus R. M. King & H. Rob. | | Asteraceae |
| Loricaria Wedd. | | a | | Loricaria Wedd. | | Asteraceae |
| Lourteigia R. M. King & H. Rob. | | a | | Lourteigia R. M. King & H. Rob. | | Asteraceae |
| Lowellia A. Gray | Thymophylla Lag. | | | Lowellia A. Gray | Thymophylla Lag. | Asteraceae |
| Loxothysanus B. L. Rob. | | a | | Loxothysanus B. L. Rob. | | Asteraceae |
| Lucilia Cass. | | a | | Lucilia Cass. | | Asteraceae |
| Luciliocline Anderb. & S. E. Freire | | a | | Luciliocline Anderb. & S. E. Freire | | Asteraceae |
| Luciliopsis Wedd. | Chaetanthera Ruiz & Pav. | | | Luciliopsis Wedd. | Chaetanthera Ruiz & Pav. | Asteraceae |
| Lugoa DC. | Gonospermum Less. | | | Lugoa DC. | Gonospermum Less. | Asteraceae |
| Luina Benth. | | a | | Luina Benth. | | Asteraceae |
| Lulia Zardini | | a | | Lulia Zardini | | Asteraceae |
| Lundellianthus H. Rob. | | a | | Lundellianthus H. Rob. | | Asteraceae |
| Lundinia B. Nord. | | a | | Lundinia B. Nord. | | Asteraceae |
| Lycapsus Phil. | | a | | Lycapsus Phil. | | Asteraceae |
| Lycoseris Cass. | | a | | Lycoseris Cass. | | Asteraceae |
| Lygodesmia D. Don | | a | | Lygodesmia D. Don | | Asteraceae |
| Lychnophora Mart. | | a | | Lychnophora Mart. | | Asteraceae |
| Lychnophorella Loeuille et al. | | a | | Lychnophorella Loeuille et al. | | Asteraceae |
| Lychnophoriopsis Sch. Bip. | | a | | Lychnophoriopsis Sch. Bip. | | Asteraceae |
| Macdougalia A. Heller | Hymenoxys Cass. | | | Macdougalia A. Heller | Hymenoxys Cass. | Asteraceae |
| Macledium Cass. | | a | | Macledium Cass. | | Asteraceae |
| Macowania Oliv. | | a | | Macowania Oliv. | | Asteraceae |
| Macraea Hook. f. | Trigonopterum Hook. f. | | | Macraea Hook. f. | Trigonopterum Hook. f. | Asteraceae |
| Macrachaenium Hook. f. | | a | | Macrachaenium Hook. f. | | Asteraceae |
| Macroclinidium Maxim. | | a | | Macroclinidium Maxim. | | Asteraceae |
| Macronema Nutt. | Ericameria Nutt. | | | Macronema Nutt. | Ericameria Nutt. | Asteraceae |
| Macropodina R. M. King & H. Rob. | | a | | Macropodina R. M. King & H. Rob. | | Asteraceae |
| Macrorhynchus Less. | Agoseris Raf. | | | Macrorhynchus Less. | Agoseris Raf. | Asteraceae |
| Macvaughiella R. M. King & H. Rob. | | a | | Macvaughiella R. M. King & H. Rob. | | Asteraceae |
| Madagaster G. L. Nesom | | a | | Madagaster G. L. Nesom | | Asteraceae |
| Madaroglossa DC. | Layia Hook. & Arn. ex DC. | | | Madaroglossa DC. | Layia Hook. & Arn. ex DC. | Asteraceae |
| Madia Molina | | a | | Madia Molina | | Asteraceae |
| Machaeranthera Nees | | a | | Machaeranthera Nees | | Asteraceae |
| Mairia Nees | | a | | Mairia Nees | | Asteraceae |
| Malacothrix DC. | | a | | Malacothrix DC. | | Asteraceae |
| Mallotopus Franch. & Sav. | | a | | Mallotopus Franch. & Sav. | | Asteraceae |
| Malmeanthus R. M. King & H. Rob. | | a | | Malmeanthus R. M. King & H. Rob. | | Asteraceae |
| Malperia S. Watson | | a | | Malperia S. Watson | | Asteraceae |
| Mantisalca Cass. | | a | | Mantisalca Cass. | | Asteraceae |
| Manyonia H. Rob. | | a | | Manyonia H. Rob. | | Asteraceae |
| Marasmodes DC. | | a | | Marasmodes DC. | | Asteraceae |
| Marshallia Schreb. | | a | | Marshallia Schreb. | | Asteraceae |
| Marshalljohnstonia Henrickson | | a | | Marshalljohnstonia Henrickson | | Asteraceae |
| Marticorenia Crisci | | a | | Marticorenia Crisci | | Asteraceae |
| Matricaria L. | | a | | Matricaria L. | | Asteraceae |
| Mattfeldanthus H. Rob. & R. M. King | | a | | Mattfeldanthus H. Rob. & R. M. King | | Asteraceae |
| Mattfeldia Urb. | | a | | Mattfeldia Urb. | | Asteraceae |
| Matudina R. M. King & H. Rob. | | a | | Matudina R. M. King & H. Rob. | | Asteraceae |
| Mauranthemum Vogt & Oberpr. | | a | | Mauranthemum Vogt & Oberpr. | | Asteraceae |
| Mausolea Poljakov | | a | | Mausolea Poljakov | | Asteraceae |
| Mecomischus Coss. ex Benth. & Hook. f. | | a | | Mecomischus Coss. ex Benth. & Hook. f. | | Asteraceae |
| Medranoa Urbatsch & R. P. Roberts | | a | | Medranoa Urbatsch & R. P. Roberts | | Asteraceae |
| Megalodonta Greene | | a | | Megalodonta Greene | | Asteraceae |
| Melampodium L. | | a | | Melampodium L. | | Asteraceae |
| Melanodendron DC. | | a | | Melanodendron DC. | | Asteraceae |
| Melanoseris Decne. | | a | | Melanoseris Decne. | | Asteraceae |
| Melanthera Rohr | | a | | Melanthera Rohr | | Asteraceae |
| Mendezia DC. | Zinnia L. | | | Mendezia DC. | Zinnia L. | Asteraceae |
| Merrittia Merr. | | a | | Merrittia Merr. | | Asteraceae |
| Mesadenia Raf. | Arnoglossum Raf. | | | Mesadenia Raf. | Arnoglossum Raf. | Asteraceae |
| Mesanthophora H. Rob. | | a | | Mesanthophora H. Rob. | | Asteraceae |
| Mesogramma DC. | | a | | Mesogramma DC. | | Asteraceae |
| Metalasia R. Br. | | a | | Metalasia R. Br. | | Asteraceae |
| Metastevia Grashoff | Stevia Cav. | | | Metastevia Grashoff | Stevia Cav. | Asteraceae |
| Mexerion G. L. Nesom | | a | | Mexerion G. L. Nesom | | Asteraceae |
| Mexianthus B. L. Rob. | | a | | Mexianthus B. L. Rob. | | Asteraceae |
| Micractis DC. | | a | | Micractis DC. | | Asteraceae |
| Microbahia Cockerell | Syntrichopappus A. Gray | | | Microbahia Cockerell | Syntrichopappus A. Gray | Asteraceae |
| Microcephala Pobed. | | a | | Microcephala Pobed. | | Asteraceae |
| Microderis A. DC. | Leontodon L. | | | Microderis A. DC. | Leontodon L. | Asteraceae |
| Microglossa DC. | | a | | Microglossa DC. | | Asteraceae |
| Microgyne Less. | | a | | Microgyne Less. | | Asteraceae |
| Microgynella Grau | Microgyne Less. | | | Microgynella Grau | Microgyne Less. | Asteraceae |
| Microchaeta Nutt. | Lipochaeta DC. | | | Microchaeta Nutt. | Lipochaeta DC. | Asteraceae |
| Microlecane Sch. Bip. ex Benth. & Hook. f. | Bidens L. | | | Microlecane Sch. Bip. ex Benth. & Hook. f. | Bidens L. | Asteraceae |
| Microliabum Cabrera | | a | | Microliabum Cabrera | | Asteraceae |
| Microlonchoides P. Candargy | Jurinea Cass. | | | Microlonchoides P. Candargy | Jurinea Cass. | Asteraceae |
| Micropsis DC. | | a | | Micropsis DC. | | Asteraceae |
| Micropus L. | | a | | Micropus L. | | Asteraceae |
| Microseris D. Don | | a | | Microseris D. Don | | Asteraceae |
| Microspermum Lag. | | a | | Microspermum Lag. | | Asteraceae |
| Microstephium Less. | Arctotheca J. C. Wendl. | | | Microstephium Less. | Arctotheca J. C. Wendl. | Asteraceae |
| Microtrichia DC. | Grangea Adans. | | | Microtrichia DC. | Grangea Adans. | Asteraceae |
| Mikania Willd. | | a | | Mikania Willd. | | Asteraceae |
| Mikaniopsis Milne-Redh. | | a | | Mikaniopsis Milne-Redh. | | Asteraceae |
| Milleria L. | | a | | Milleria L. | | Asteraceae |
| Millotia Cass. | | a | | Millotia Cass. | | Asteraceae |
| Mimela Phil. | Leucheria Lag. | | | Mimela Phil. | Leucheria Lag. | Asteraceae |
| Minasia H. Rob. | | a | | Minasia H. Rob. | | Asteraceae |
| Minuria DC. | | a | | Minuria DC. | | Asteraceae |
| Mirasolia (Sch. Bip.) Benth. | Tithonia Desf. ex Juss. | | | Mirasolia (Sch. Bip.) Benth. | Tithonia Desf. ex Juss. | Asteraceae |
| Miricacalia Kitam. | | a | | Miricacalia Kitam. | | Asteraceae |
| Misbrookea V. A. Funk | | a | | Misbrookea V. A. Funk | | Asteraceae |
| Mixtecalia Redonda-Mart. et al. | | a | | Mixtecalia Redonda-Mart. et al. | | Asteraceae |
| Miyamayomena Kitam. | Aster L. | | | Miyamayomena Kitam. | Aster L. | Asteraceae |
| Mniodes (A. Gray) Benth. | | a | | Mniodes (A. Gray) Benth. | | Asteraceae |
| Modestia Kharadze & Tamamsch. | Anacantha (Iljin) Soják | | | Modestia Kharadze & Tamamsch. | Anacantha (Iljin) Soják | Asteraceae |
| Molina Ruiz & Pav. | Baccharis L. | | | Molina Ruiz & Pav. | Baccharis L. | Asteraceae |
| Mollera O. Hoffm. | Calostephane Benth. | | | Mollera O. Hoffm. | Calostephane Benth. | Asteraceae |
| Monactinocephalus Klatt | | a | | Monactinocephalus Klatt | | Asteraceae |
| Monactis Kunth | | a | | Monactis Kunth | | Asteraceae |
| Monarrhenus Cass. | | a | | Monarrhenus Cass. | | Asteraceae |
| Monenteles Labill. | Pterocaulon Elliott | | | Monenteles Labill. | Pterocaulon Elliott | Asteraceae |
| Monoculus B. Nord. | | a | | Monoculus B. Nord. | | Asteraceae |
| Monogereion G. M. Barroso & R. M. King | | a | | Monogereion G. M. Barroso & R. M. King | | Asteraceae |
| Monolopia DC. | | a | | Monolopia DC. | | Asteraceae |
| Monopholis S. F. Blake | Monactis Kunth | | | Monopholis S. F. Blake | Monactis Kunth | Asteraceae |
| Monoptera Sch. Bip. | Argyranthemum Webb ex Sch. Bip. | | | Monoptera Sch. Bip. | Argyranthemum Webb ex Sch. Bip. | Asteraceae |
| Monoptilon Torr. & A. Gray | | a | | Monoptilon Torr. & A. Gray | | Asteraceae |
| Monosis DC. | | a | | Monosis DC. | | Asteraceae |
| Montanoa Cerv. | | a | | Montanoa Cerv. | | Asteraceae |
| Monticalia C. Jeffrey | | a | | Monticalia C. Jeffrey | | Asteraceae |
| Moonia Arn. | | a | | Moonia Arn. | | Asteraceae |
| Moquinia DC. | | a | | Moquinia DC. | | Asteraceae |
| Morithamnus R. M. King et al. | | a | | Morithamnus R. M. King et al. | | Asteraceae |
| Moscharia Ruiz & Pav. | | a | | Moscharia Ruiz & Pav. | | Asteraceae |
| Msuata O. Hoffm. | | a | | Msuata O. Hoffm. | | Asteraceae |
| Mulgedium Cass. | Lactuca L. | | | Mulgedium Cass. | Lactuca L. | Asteraceae |
| Munnozia Ruiz & Pav. | | a | | Munnozia Ruiz & Pav. | | Asteraceae |
| Munzothamnus P. H. Raven | | a | | Munzothamnus P. H. Raven | | Asteraceae |
| Muschleria S. Moore | | a | | Muschleria S. Moore | | Asteraceae |
| Musilia Velen. | Rhanterium Desf. | | | Musilia Velen. | Rhanterium Desf. | Asteraceae |
| Mustelia Spreng. | Stevia Cav. | | | Mustelia Spreng. | Stevia Cav. | Asteraceae |
| Mutisia L. f. | | a | | Mutisia L. f. | | Asteraceae |
| Myanmaria H. Rob. | | a | | Myanmaria H. Rob. | | Asteraceae |
| Mycelis Cass. | Cicerbita Wallr. | | | Mycelis Cass. | Cicerbita Wallr. | Asteraceae |
| Myopordon Boiss. | | a | | Myopordon Boiss. | | Asteraceae |
| Myriactis Less. | | a | | Myriactis Less. | | Asteraceae |
| Myriocephalus Benth. | | a | | Myriocephalus Benth. | | Asteraceae |
| Myripnois Bunge | | a | | Myripnois Bunge | | Asteraceae |
| Myrovernix Koek. | | a | | Myrovernix Koek. | | Asteraceae |
| Myxopappus Källersjö | | a | | Myxopappus Källersjö | | Asteraceae |
| Nabalus Cass. | | a | | Nabalus Cass. | | Asteraceae |
| Nablonium Cass. | Ammobium R. Br. ex Sims | | | Nablonium Cass. | Ammobium R. Br. ex Sims | Asteraceae |
| Nahuatlea V. A. Funk | | a | | Nahuatlea V. A. Funk | | Asteraceae |
| Nananthea DC. | | a | | Nananthea DC. | | Asteraceae |
| Nannoglottis Maxim. | | a | | Nannoglottis Maxim. | | Asteraceae |
| Nanothamnus Thomson | | a | | Nanothamnus Thomson | | Asteraceae |
| Nardophyllum (Hook. & Arn.) Hook. & Arn. | | a | | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | Asteraceae |
| Nardosmia Cass. | Petasites Mill. | | | Nardosmia Cass. | Petasites Mill. | Asteraceae |
| Narvalina Cass. | | a | | Narvalina Cass. | | Asteraceae |
| Nassauvia Comm. ex Juss. | | a | | Nassauvia Comm. ex Juss. | | Asteraceae |
| Nauplius (Cass.) Cass. | Asteriscus Mill. | | | Nauplius (Cass.) Cass. | Asteriscus Mill. | Asteraceae |
| Neblinaea Maguire & Wurdack | | a | | Neblinaea Maguire & Wurdack | | Asteraceae |
| Neja D. Don | Erigeron L. | | | Neja D. Don | Erigeron L. | Asteraceae |
| Nelsonianthus H. Rob. & Brettell | | a | | Nelsonianthus H. Rob. & Brettell | | Asteraceae |
| Nemosenecio (Kitam.) B. Nord. | | a | | Nemosenecio (Kitam.) B. Nord. | | Asteraceae |
| Nemoseris Greene | Rafinesquia Nutt. | | | Nemoseris Greene | Rafinesquia Nutt. | Asteraceae |
| Neobartlettia R. M. King & H. Rob. | Bartlettina R. M. King & H. Rob. | | | Neobartlettia R. M. King & H. Rob. | Bartlettina R. M. King & H. Rob. | Asteraceae |
| Neobrachyactis Brouillet | | a | | Neobrachyactis Brouillet | | Asteraceae |
| Neocabreria R. M. King & H. Rob. | | a | | Neocabreria R. M. King & H. Rob. | | Asteraceae |
| Neocuatrecasia R. M. King & H. Rob. | | a | | Neocuatrecasia R. M. King & H. Rob. | | Asteraceae |
| Neohintonia R. M. King & H. Rob. | Koanophyllon Arruda | | | Neohintonia R. M. King & H. Rob. | Koanophyllon Arruda | Asteraceae |
| Neojeffreya Cabrera | | a | | Neojeffreya Cabrera | | Asteraceae |
| Neomirandea R. M. King & H. Rob. | | a | | Neomirandea R. M. King & H. Rob. | | Asteraceae |
| Neomolina F. H. Hellwig | Baccharis L. | | | Neomolina F. H. Hellwig | Baccharis L. | Asteraceae |
| Neonesomia Urbatsch & R. P. Roberts | | a | | Neonesomia Urbatsch & R. P. Roberts | | Asteraceae |
| Neopallasia Poljakov | | a | | Neopallasia Poljakov | | Asteraceae |
| Neothymopsis Britton & Millsp. | Thymopsis Benth. | | | Neothymopsis Britton & Millsp. | Thymopsis Benth. | Asteraceae |
| Neotysonia Dalla Torre & Harms | | a | | Neotysonia Dalla Torre & Harms | | Asteraceae |
| Nephrotheca B. Nord. & Källersjö | | a | | Nephrotheca B. Nord. & Källersjö | | Asteraceae |
| Nesampelos B. Nord. | | a | | Nesampelos B. Nord. | | Asteraceae |
| Nesomia B. L. Turner | | a | | Nesomia B. L. Turner | | Asteraceae |
| Nesothamnus Rydb. | Perityle Benth. | | | Nesothamnus Rydb. | Perityle Benth. | Asteraceae |
| Nestlera Spreng. | | a | | Nestlera Spreng. | | Asteraceae |
| Nestotus R. P. Roberts et al. | | a | | Nestotus R. P. Roberts et al. | | Asteraceae |
| Neuractis Cass. | Glossocardia Cass. | | | Neuractis Cass. | Glossocardia Cass. | Asteraceae |
| Neurolaena R. Br. | | a | | Neurolaena R. Br. | | Asteraceae |
| Neurolakis Mattf. | | a | | Neurolakis Mattf. | | Asteraceae |
| Nicolasia S. Moore | | a | | Nicolasia S. Moore | | Asteraceae |
| Nicolletia A. Gray | | a | | Nicolletia A. Gray | | Asteraceae |
| Nidorella Cass. | | a | | Nidorella Cass. | | Asteraceae |
| Nikitinia Iljin | Klasea Cass. | | | Nikitinia Iljin | Klasea Cass. | Asteraceae |
| Nipponanthemum (Kitam.) Kitam. | | a | | Nipponanthemum (Kitam.) Kitam. | | Asteraceae |
| Nivellea B. H. Wilcox et al. | | a | | Nivellea B. H. Wilcox et al. | | Asteraceae |
| Nolletia Cass. | | a | | Nolletia Cass. | | Asteraceae |
| Nordenstamia Lundin | | a | | Nordenstamia Lundin | | Asteraceae |
| Norlindhia B. Nord. | | a | | Norlindhia B. Nord. | | Asteraceae |
| Nothobaccharis R. M. King & H. Rob. | | a | | Nothobaccharis R. M. King & H. Rob. | | Asteraceae |
| Nothocalais (A. Gray) Greene | | a | | Nothocalais (A. Gray) Greene | | Asteraceae |
| Nothovernonia H. Rob. & V. A. Funk | | a | | Nothovernonia H. Rob. & V. A. Funk | | Asteraceae |
| Noticastrum DC. | | a | | Noticastrum DC. | | Asteraceae |
| Notobasis (Cass.) Cass. | | a | | Notobasis (Cass.) Cass. | | Asteraceae |
| Notonia DC. | Kleinia Mill. | | | Notonia DC. | Kleinia Mill. | Asteraceae |
| Notoniopsis B. Nord. | Kleinia Mill. | | | Notoniopsis B. Nord. | Kleinia Mill. | Asteraceae |
| Notoptera Urb. | Otopappus Benth. | | | Notoptera Urb. | Otopappus Benth. | Asteraceae |
| Notoseris C. Shih | | a | | Notoseris C. Shih | | Asteraceae |
| Nouelia Franch. | | a | | Nouelia Franch. | | Asteraceae |
| Novenia S. E. Freire | | a | | Novenia S. E. Freire | | Asteraceae |
| Oaxacania B. L. Rob. & Greenm. | Hofmeisteria Walp. | | | Oaxacania B. L. Rob. & Greenm. | Hofmeisteria Walp. | Asteraceae |
| Oblivia Strother | | a | | Oblivia Strother | | Asteraceae |
| Oclemena Greene | | a | | Oclemena Greene | | Asteraceae |
| Ocyroe Phil. | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | | Ocyroe Phil. | Nardophyllum (Hook. & Arn.) Hook. & Arn. | Asteraceae |
| Odixia Orchard | | a | | Odixia Orchard | | Asteraceae |
| Odontocline B. Nord. | | a | | Odontocline B. Nord. | | Asteraceae |
| Odontospermum Neck. ex Sch. Bip. | Asteriscus Mill. | | | Odontospermum Neck. ex Sch. Bip. | Asteriscus Mill. | Asteraceae |
| Odontotrichum Zucc. | Psacalium Cass. | | | Odontotrichum Zucc. | Psacalium Cass. | Asteraceae |
| Oedera L. | | a | | Oedera L. | | Asteraceae |
| Ochrocephala Dittrich | | a | | Ochrocephala Dittrich | | Asteraceae |
| Oiospermum Less. | | a | | Oiospermum Less. | | Asteraceae |
| Okia H. Rob. & Skvarla | | a | | Okia H. Rob. & Skvarla | | Asteraceae |
| Oldenburgia Less. | | a | | Oldenburgia Less. | | Asteraceae |
| Oldfeltia B. Nord. & Lundin | | a | | Oldfeltia B. Nord. & Lundin | | Asteraceae |
| Olearia Moench | | a | | Olearia Moench | | Asteraceae |
| Olgaea Iljin | | a | | Olgaea Iljin | | Asteraceae |
| Oligactis (Kunth) Cass. | | a | | Oligactis (Kunth) Cass. | | Asteraceae |
| Oligandra Less. | Lucilia Cass. | | | Oligandra Less. | Lucilia Cass. | Asteraceae |
| Oliganthes Cass. | | a | | Oliganthes Cass. | | Asteraceae |
| Oligocarpus Less. | | a | | Oligocarpus Less. | | Asteraceae |
| Oligochaeta (DC.) K. Koch | | a | | Oligochaeta (DC.) K. Koch | | Asteraceae |
| Oligoneuron Small | Solidago L. | | | Oligoneuron Small | Solidago L. | Asteraceae |
| Oligosporus Cass. | Artemisia L. | | | Oligosporus Cass. | Artemisia L. | Asteraceae |
| Oligothrix DC. | | a | | Oligothrix DC. | | Asteraceae |
| Olivaea Sch. Bip. ex Benth. | | a | | Olivaea Sch. Bip. ex Benth. | | Asteraceae |
| Omalotheca Cass. | | a | | Omalotheca Cass. | | Asteraceae |
| Omphalopappus O. Hoffm. | | a | | Omphalopappus O. Hoffm. | | Asteraceae |
| Oncosiphon Källersjö | | a | | Oncosiphon Källersjö | | Asteraceae |
| Ondetia Benth. | | a | | Ondetia Benth. | | Asteraceae |
| Onopordum L. | | a | | Onopordum L. | | Asteraceae |
| Onoseris Willd. | | a | | Onoseris Willd. | | Asteraceae |
| Oocephala (S. B. Jones) H. Rob. | | a | | Oocephala (S. B. Jones) H. Rob. | | Asteraceae |
| Oonopsis (Nutt.) Greene | | a | | Oonopsis (Nutt.) Greene | | Asteraceae |
| Oparanthus Sherff | Bidens L. | | | Oparanthus Sherff | Bidens L. | Asteraceae |
| Ophryosporus Meyen | | a | | Ophryosporus Meyen | | Asteraceae |
| Opisthopappus C. Shih | | a | | Opisthopappus C. Shih | | Asteraceae |
| Orbivestus H. Rob. | | a | | Orbivestus H. Rob. | | Asteraceae |
| Oreastrum Greene | Aster L. | | | Oreastrum Greene | Aster L. | Asteraceae |
| Oreochrysum Rydb. | | a | | Oreochrysum Rydb. | | Asteraceae |
| Oreoleysera K. Bremer | | a | | Oreoleysera K. Bremer | | Asteraceae |
| Oreostemma Greene | | a | | Oreostemma Greene | | Asteraceae |
| Oresbia Cron & B. Nord. | | a | | Oresbia Cron & B. Nord. | | Asteraceae |
| Oritrophium (Kunth) Cuatrec. | | a | | Oritrophium (Kunth) Cuatrec. | | Asteraceae |
| Ormenis (Cass.) Cass. | Chamaemelum Mill. | | | Ormenis (Cass.) Cass. | Chamaemelum Mill. | Asteraceae |
| Orochaenactis Coville | | a | | Orochaenactis Coville | | Asteraceae |
| Orthopappus Gleason | | a | | Orthopappus Gleason | | Asteraceae |
| Osbertia Greene | | a | | Osbertia Greene | | Asteraceae |
| Osmadenia Nutt. | | a | | Osmadenia Nutt. | | Asteraceae |
| Osmiopsis R. M. King & H. Rob. | | a | | Osmiopsis R. M. King & H. Rob. | | Asteraceae |
| Osmitopsis Cass. | | a | | Osmitopsis Cass. | | Asteraceae |
| Osteospermum L. | | a | | Osteospermum L. | | Asteraceae |
| Otanthus Hoffmanns. & Link | | a | | Otanthus Hoffmanns. & Link | | Asteraceae |
| Oteiza La Llave | | a | | Oteiza La Llave | | Asteraceae |
| Othonna L. | | a | | Othonna L. | | Asteraceae |
| Othonnopsis Jaub. & Spach | Othonna L. | | | Othonnopsis Jaub. & Spach | Othonna L. | Asteraceae |
| Otopappus Benth. | | a | | Otopappus Benth. | | Asteraceae |
| Otospermum Willk. | | a | | Otospermum Willk. | | Asteraceae |
| Outreya Jaub. & Spach | Jurinea Cass. | | | Outreya Jaub. & Spach | Jurinea Cass. | Asteraceae |
| Oxycarpha S. F. Blake | | a | | Oxycarpha S. F. Blake | | Asteraceae |
| Oxylaena Benth. ex Anderb. | Gibbaria Cass. | | | Oxylaena Benth. ex Anderb. | Gibbaria Cass. | Asteraceae |
| Oxylobus (Moc. ex DC.) A. Gray | | a | | Oxylobus (Moc. ex DC.) A. Gray | | Asteraceae |
| Oxypappus Benth. | | a | | Oxypappus Benth. | | Asteraceae |
| Oxyphyllum Phil. | | a | | Oxyphyllum Phil. | | Asteraceae |
| Oxytenia Nutt. | | a | | Oxytenia Nutt. | | Asteraceae |
| Oyedaea DC. | | a | | Oyedaea DC. | | Asteraceae |
| Ozothamnus R. Br. | | a | | Ozothamnus R. Br. | | Asteraceae |
| Pacifigeron G. L. Nesom | | a | | Pacifigeron G. L. Nesom | | Asteraceae |
| Packera Á. Löve & D. Löve | | a | | Packera Á. Löve & D. Löve | | Asteraceae |
| Pacourina Aubl. | | a | | Pacourina Aubl. | | Asteraceae |
| Paenula Orchard | | a | | Paenula Orchard | | Asteraceae |
| Pachylaena D. Don ex Hook. & Arn. | | a | | Pachylaena D. Don ex Hook. & Arn. | | Asteraceae |
| Pachyrhynchus DC. | Lucilia Cass. | | | Pachyrhynchus DC. | Lucilia Cass. | Asteraceae |
| Pachystegia Cheeseman | | a | | Pachystegia Cheeseman | | Asteraceae |
| Pachythamnus (R. M. King & H. Rob.) R. M. King & H. Rob. | | a | | Pachythamnus (R. M. King & H. Rob.) R. M. King & H. Rob. | | Asteraceae |
| Palaeocyanus Dostál | Cheirolophus Cass. | | | Palaeocyanus Dostál | Cheirolophus Cass. | Asteraceae |
| Palafoxia Lag. | | a | | Palafoxia Lag. | | Asteraceae |
| Paleaepappus Cabrera | Nardophyllum (Hook. & Arn.) Hook. & Arn. | | | Paleaepappus Cabrera | Nardophyllum (Hook. & Arn.) Hook. & Arn. | Asteraceae |
| Pallenis (Cass.) Cass. | Asteriscus Mill. | | | Pallenis (Cass.) Cass. | Asteriscus Mill. | Asteraceae |
| Pallenis Cass. | | a | | Pallenis Cass. | | Asteraceae |
| Pamphalea Lag. | | a | | Pamphalea Lag. | | Asteraceae |
| Panphalea Lag., orth. var. | Pamphalea Lag. | | | Panphalea Lag., orth. var. | Pamphalea Lag. | Asteraceae |
| Pappobolus S. F. Blake | | a | | Pappobolus S. F. Blake | | Asteraceae |
| Pappochroma Raf. | | a | | Pappochroma Raf. | | Asteraceae |
| Papuacalia Veldkamp | | a | | Papuacalia Veldkamp | | Asteraceae |
| Paquirea Panero & S. E. Freire | | a | | Paquirea Panero & S. E. Freire | | Asteraceae |
| Paracalia Cuatrec. | | a | | Paracalia Cuatrec. | | Asteraceae |
| Parafaujasia C. Jeffrey | | a | | Parafaujasia C. Jeffrey | | Asteraceae |
| Paragynoxys (Cuatrec.) Cuatrec. | | a | | Paragynoxys (Cuatrec.) Cuatrec. | | Asteraceae |
| Parachionolaena M. O. Dillon & Sagást. | Chionolaena DC. | | | Parachionolaena M. O. Dillon & Sagást. | Chionolaena DC. | Asteraceae |
| Paraixeris Nakai | Crepidiastrum Nakai | | | Paraixeris Nakai | Crepidiastrum Nakai | Asteraceae |
| Paralychnophora MacLeish | Eremanthus Less. | | | Paralychnophora MacLeish | Eremanthus Less. | Asteraceae |
| Paramicrorhynchus Kirp. | Launaea Cass. | | | Paramicrorhynchus Kirp. | Launaea Cass. | Asteraceae |
| Paranephelius Poepp. | | a | | Paranephelius Poepp. | | Asteraceae |
| Parantennaria Beauverd | | a | | Parantennaria Beauverd | | Asteraceae |
| Paraphysis (DC.) Dostál | Centaurea L. | | | Paraphysis (DC.) Dostál | Centaurea L. | Asteraceae |
| Parapiqueria R. M. King & H. Rob. | | a | | Parapiqueria R. M. King & H. Rob. | | Asteraceae |
| Parapolydora H. Rob. | | a | | Parapolydora H. Rob. | | Asteraceae |
| Paraprenanthes C. C. Chang ex C. Shih | | a | | Paraprenanthes C. C. Chang ex C. Shih | | Asteraceae |
| Parasenecio W. W. Sm. & Small | | a | | Parasenecio W. W. Sm. & Small | | Asteraceae |
| Parastrephia Nutt. | | a | | Parastrephia Nutt. | | Asteraceae |
| Parasyncalathium J. W. Zhang | Melanoseris Decne. | | | Parasyncalathium J. W. Zhang | Melanoseris Decne. | Asteraceae |
| Parthenice A. Gray | | a | | Parthenice A. Gray | | Asteraceae |
| Parthenium L. | | a | | Parthenium L. | | Asteraceae |
| Pasaccardoa Kuntze | | a | | Pasaccardoa Kuntze | | Asteraceae |
| Pascalia Ortega | | a | | Pascalia Ortega | | Asteraceae |
| Pascalium Cass., orth. var. | Psacalium Cass. | | | Pascalium Cass., orth. var. | Psacalium Cass. | Asteraceae |
| Paua Caball. | Andryala L. | | | Paua Caball. | Andryala L. | Asteraceae |
| Paurolepis S. Moore | | a | | Paurolepis S. Moore | | Asteraceae |
| Pectis L. | | a | | Pectis L. | | Asteraceae |
| Pegolettia Cass. | | a | | Pegolettia Cass. | | Asteraceae |
| Pechuel-Loeschea O. Hoffm. | | a | | Pechuel-Loeschea O. Hoffm. | | Asteraceae |
| Pelucha S. Watson | | a | | Pelucha S. Watson | | Asteraceae |
| Pembertonia P. S. Short | | a | | Pembertonia P. S. Short | | Asteraceae |
| Pentacalia Cass. | | a | | Pentacalia Cass. | | Asteraceae |
| Pentachaeta Nutt. | | a | | Pentachaeta Nutt. | | Asteraceae |
| Pentalepis F. Muell. | | a | | Pentalepis F. Muell. | | Asteraceae |
| Pentanema Cass. | | a | | Pentanema Cass. | | Asteraceae |
| Pentaphorus D. Don | Gochnatia Kunth | | | Pentaphorus D. Don | Gochnatia Kunth | Asteraceae |
| Pentatrichia Klatt | | a | | Pentatrichia Klatt | | Asteraceae |
| Pentheriella O. Hoffm. & Muschl. | Heteromma Benth. | | | Pentheriella O. Hoffm. & Muschl. | Heteromma Benth. | Asteraceae |
| Pentzia Thunb. | | a | | Pentzia Thunb. | | Asteraceae |
| Perdicium L. | | a | | Perdicium L. | | Asteraceae |
| Perezia Lag. | | a | | Perezia Lag. | | Asteraceae |
| Pericalia Cass. | Roldana La Llave | | | Pericalia Cass. | Roldana La Llave | Asteraceae |
| Pericallis D. Don | | a | | Pericallis D. Don | | Asteraceae |
| Pericome A. Gray | | a | | Pericome A. Gray | | Asteraceae |
| Peripleura (N. T. Burb.) G. L. Nesom | | a | | Peripleura (N. T. Burb.) G. L. Nesom | | Asteraceae |
| Perityle Benth. | | a | | Perityle Benth. | | Asteraceae |
| Perplexia Iljin | Jurinea Cass. | | | Perplexia Iljin | Jurinea Cass. | Asteraceae |
| Perralderia Coss. | | a | | Perralderia Coss. | | Asteraceae |
| Perralderiopsis Rauschert | Iphiona Cass. | | | Perralderiopsis Rauschert | Iphiona Cass. | Asteraceae |
| Pertya Sch. Bip. | | a | | Pertya Sch. Bip. | | Asteraceae |
| Perymeniopsis H. Rob. | | a | | Perymeniopsis H. Rob. | | Asteraceae |
| Perymenium Schrad. | | a | | Perymenium Schrad. | | Asteraceae |
| Petalacte D. Don | | a | | Petalacte D. Don | | Asteraceae |
| Petasites Mill. | | a | | Petasites Mill. | | Asteraceae |
| Peteravenia R. M. King & H. Rob. | | a | | Peteravenia R. M. King & H. Rob. | | Asteraceae |
| Petradoria Greene | | a | | Petradoria Greene | | Asteraceae |
| Petrobium R. Br. | Bidens L. | | | Petrobium R. Br. | Bidens L. | Asteraceae |
| Petrodavisia Holub | Centaurea L. | | | Petrodavisia Holub | Centaurea L. | Asteraceae |
| Peucephyllum A. Gray | | a | | Peucephyllum A. Gray | | Asteraceae |
| Peyrousea DC. | Schistostephium Less. | | | Peyrousea DC. | Schistostephium Less. | Asteraceae |
| Phacellothrix F. Muell. | | a | | Phacellothrix F. Muell. | | Asteraceae |
| Phaenixopus Cass. | Lactuca L. | | | Phaenixopus Cass. | Lactuca L. | Asteraceae |
| Phaenocoma D. Don | | a | | Phaenocoma D. Don | | Asteraceae |
| Phaenopus DC. | Lactuca L. | | | Phaenopus DC. | Lactuca L. | Asteraceae |
| Phaeocephalus S. Moore | Hymenolepis Cass. | | | Phaeocephalus S. Moore | Hymenolepis Cass. | Asteraceae |
| Phaeopappus (DC.) Boiss. | Centaurea L. | | | Phaeopappus (DC.) Boiss. | Centaurea L. | Asteraceae |
| Phaeostigma Muldashev | | a | | Phaeostigma Muldashev | | Asteraceae |
| Phagnalon Cass. | | a | | Phagnalon Cass. | | Asteraceae |
| Phalacraea DC. | | a | | Phalacraea DC. | | Asteraceae |
| Phalacrachena Iljin | | a | | Phalacrachena Iljin | | Asteraceae |
| Phalacrocarpum (DC.) Willk. | | a | | Phalacrocarpum (DC.) Willk. | | Asteraceae |
| Phalacroderis DC. | Crepis L. | | | Phalacroderis DC. | Crepis L. | Asteraceae |
| Phalacroseris A. Gray | | a | | Phalacroseris A. Gray | | Asteraceae |
| Phaneroglossa B. Nord. | | a | | Phaneroglossa B. Nord. | | Asteraceae |
| Phanerostylis (A. Gray) R. M. King & H. Rob. | Brickellia Elliott | | | Phanerostylis (A. Gray) R. M. King & H. Rob. | Brickellia Elliott | Asteraceae |
| Phania DC. | | a | | Phania DC. | | Asteraceae |
| Philactis Schrad. | | a | | Philactis Schrad. | | Asteraceae |
| Philoglossa DC. | | a | | Philoglossa DC. | | Asteraceae |
| Philyrophyllum O. Hoffm. | | a | | Philyrophyllum O. Hoffm. | | Asteraceae |
| Phitosia Kamari & Greuter | | a | | Phitosia Kamari & Greuter | | Asteraceae |
| Phoebanthus S. F. Blake | | a | | Phoebanthus S. F. Blake | | Asteraceae |
| Phoenicoseris (Skottsb.) Skottsb. | Dendroseris D. Don | | | Phoenicoseris (Skottsb.) Skottsb. | Dendroseris D. Don | Asteraceae |
| Phonus Hill | Carduncellus Adans. | | | Phonus Hill | Carduncellus Adans. | Asteraceae |
| Phyllocephalum Blume | | a | | Phyllocephalum Blume | | Asteraceae |
| Phyllopappus Walp. | Microseris D. Don | | | Phyllopappus Walp. | Microseris D. Don | Asteraceae |
| Phymaspermum Less. | | a | | Phymaspermum Less. | | Asteraceae |
| Picnomon Adans. | | a | | Picnomon Adans. | | Asteraceae |
| Picradenia Hook. | Hymenoxys Cass. | | | Picradenia Hook. | Hymenoxys Cass. | Asteraceae |
| Picradeniopsis Rydb. ex Britton | | a | | Picradeniopsis Rydb. ex Britton | | Asteraceae |
| Picridium Desf. | Reichardia Roth | | | Picridium Desf. | Reichardia Roth | Asteraceae |
| Picris L. | | a | | Picris L. | | Asteraceae |
| Picrosia D. Don | | a | | Picrosia D. Don | | Asteraceae |
| Picrothamnus Nutt. | | a | | Picrothamnus Nutt. | | Asteraceae |
| Pilosella Hill | | a | | Pilosella Hill | | Asteraceae |
| Piloselloides (Less.) C. Jeffrey | Gerbera L. | | | Piloselloides (Less.) C. Jeffrey | Gerbera L. | Asteraceae |
| Pilostemon Iljin | | a | | Pilostemon Iljin | | Asteraceae |
| Pinaropappus Less. | | a | | Pinaropappus Less. | | Asteraceae |
| Pingraea Cass. | Baccharis L. | | | Pingraea Cass. | Baccharis L. | Asteraceae |
| Pinillosia Ossa | | a | | Pinillosia Ossa | | Asteraceae |
| Piofontia Cuatrec. | | a | | Piofontia Cuatrec. | | Asteraceae |
| Pionocarpus S. F. Blake | Iostephane Benth. | | | Pionocarpus S. F. Blake | Iostephane Benth. | Asteraceae |
| Piora J. Kost. | | a | | Piora J. Kost. | | Asteraceae |
| Pippenalia McVaugh | | a | | Pippenalia McVaugh | | Asteraceae |
| Piptocarpha R. Br. | | a | | Piptocarpha R. Br. | | Asteraceae |
| Piptocoma Cass. | | a | | Piptocoma Cass. | | Asteraceae |
| Piptolepis Sch. Bip. | | a | | Piptolepis Sch. Bip. | | Asteraceae |
| Piptothrix A. Gray | | a | | Piptothrix A. Gray | | Asteraceae |
| Piqueria Cav. | | a | | Piqueria Cav. | | Asteraceae |
| Piqueriella R. M. King & H. Rob. | | a | | Piqueriella R. M. King & H. Rob. | | Asteraceae |
| Piqueriopsis R. M. King | | a | | Piqueriopsis R. M. King | | Asteraceae |
| Pithecoseris Mart. ex DC. | | a | | Pithecoseris Mart. ex DC. | | Asteraceae |
| Pithocarpa Lindl. | | a | | Pithocarpa Lindl. | | Asteraceae |
| Pittocaulon H. Rob. & Brettell | | a | | Pittocaulon H. Rob. & Brettell | | Asteraceae |
| Pityopsis Nutt. | | a | | Pityopsis Nutt. | | Asteraceae |
| Placus Lour. | Blumea DC. | | | Placus Lour. | Blumea DC. | Asteraceae |
| Pladaroxylon (Endl.) Hook. f. | | a | | Pladaroxylon (Endl.) Hook. f. | | Asteraceae |
| Plagiobasis Schrenk | | a | | Plagiobasis Schrenk | | Asteraceae |
| Plagiocheilus Arn. ex DC. | | a | | Plagiocheilus Arn. ex DC. | | Asteraceae |
| Plagiolophus Greenm. | | a | | Plagiolophus Greenm. | | Asteraceae |
| Plagius LʼHér. ex DC. | | a | | Plagius LʼHér. ex DC. | | Asteraceae |
| Planaltoa Taub. | | a | | Planaltoa Taub. | | Asteraceae |
| Planea P. O. Karis | | a | | Planea P. O. Karis | | Asteraceae |
| Plateilema (A. Gray) Cockerell | | a | | Plateilema (A. Gray) Cockerell | | Asteraceae |
| Platycarpha Less. | | a | | Platycarpha Less. | | Asteraceae |
| Platycarphella V. A. Funk & H. Rob. | | a | | Platycarphella V. A. Funk & H. Rob. | | Asteraceae |
| Platychaete Boiss. | Pulicaria Gaertn. | | | Platychaete Boiss. | Pulicaria Gaertn. | Asteraceae |
| Platypodanthera R. M. King & H. Rob. | | a | | Platypodanthera R. M. King & H. Rob. | | Asteraceae |
| Platyschkuhria (A. Gray) Rydb. | | a | | Platyschkuhria (A. Gray) Rydb. | | Asteraceae |
| Plazia Ruiz & Pav. | | a | | Plazia Ruiz & Pav. | | Asteraceae |
| Plecostachys Hilliard & B. L. Burtt | | a | | Plecostachys Hilliard & B. L. Burtt | | Asteraceae |
| Plectocephalus D. Don | | a | | Plectocephalus D. Don | | Asteraceae |
| Pleiacanthus Rydb. | | a | | Pleiacanthus Rydb. | | Asteraceae |
| Pleiotaxis Steetz | | a | | Pleiotaxis Steetz | | Asteraceae |
| Pleocarphus D. Don | | a | | Pleocarphus D. Don | | Asteraceae |
| Pleurocarpaea Benth. | | a | | Pleurocarpaea Benth. | | Asteraceae |
| Pleurocoronis R. M. King & H. Rob. | | a | | Pleurocoronis R. M. King & H. Rob. | | Asteraceae |
| Pleuropappus F. Muell. | Angianthus J. C. Wendl. | | | Pleuropappus F. Muell. | Angianthus J. C. Wendl. | Asteraceae |
| Pleurophyllum Hook. f. | | a | | Pleurophyllum Hook. f. | | Asteraceae |
| Pluchea Cass. | | a | | Pluchea Cass. | | Asteraceae |
| Plummera A. Gray | Hymenoxys Cass. | | | Plummera A. Gray | Hymenoxys Cass. | Asteraceae |
| Podachaenium Benth. ex Oerst. | | a | | Podachaenium Benth. ex Oerst. | | Asteraceae |
| Podanthus Lag. | | a | | Podanthus Lag. | | Asteraceae |
| Podocoma Cass. | | a | | Podocoma Cass. | | Asteraceae |
| Podolepis Labill. | | a | | Podolepis Labill. | | Asteraceae |
| Podophania Baill. | Hofmeisteria Walp. | | | Podophania Baill. | Hofmeisteria Walp. | Asteraceae |
| Podospermum DC. | | a | | Podospermum DC. | | Asteraceae |
| Podotheca Cass. | | a | | Podotheca Cass. | | Asteraceae |
| Poecilolepis Grau | | a | | Poecilolepis Grau | | Asteraceae |
| Pogonolepis Steetz | | a | | Pogonolepis Steetz | | Asteraceae |
| Pojarkovia Askerova | | a | | Pojarkovia Askerova | | Asteraceae |
| Poljakovia Grubov & Filatova | | a | | Poljakovia Grubov & Filatova | | Asteraceae |
| Pollalesta Kunth | Piptocoma Cass. | | | Pollalesta Kunth | Piptocoma Cass. | Asteraceae |
| Polyachyrus Lag. | | a | | Polyachyrus Lag. | | Asteraceae |
| Polyanthina R. M. King & H. Rob. | | a | | Polyanthina R. M. King & H. Rob. | | Asteraceae |
| Polyarrhena Cass. | | a | | Polyarrhena Cass. | | Asteraceae |
| Polycalymma F. Muell. & Sond. | | a | | Polycalymma F. Muell. & Sond. | | Asteraceae |
| Polydora Fenzl | | a | | Polydora Fenzl | | Asteraceae |
| Polychaetia Less. | Nestlera Spreng. | | | Polychaetia Less. | Nestlera Spreng. | Asteraceae |
| Polychrysum (Tzvelev) Kovalevsk. | | a | | Polychrysum (Tzvelev) Kovalevsk. | | Asteraceae |
| Polymnia Kalm | | a | | Polymnia Kalm | | Asteraceae |
| Polypappus Less. | Baccharis L. | | | Polypappus Less. | Baccharis L. | Asteraceae |
| Polypteris Nutt. | Palafoxia Lag. | | | Polypteris Nutt. | Palafoxia Lag. | Asteraceae |
| Polytaxis Bunge | | a | | Polytaxis Bunge | | Asteraceae |
| Porcellites Cass. | Hypochaeris L. | | | Porcellites Cass. | Hypochaeris L. | Asteraceae |
| Porophyllum Adans. | | a | | Porophyllum Adans. | | Asteraceae |
| Porphyrostemma Grant ex Benth. & Hook. f. | | a | | Porphyrostemma Grant ex Benth. & Hook. f. | | Asteraceae |
| Postia Boiss. & Blanche | Rhanteriopsis Rauschert | | | Postia Boiss. & Blanche | Rhanteriopsis Rauschert | Asteraceae |
| Praxeliopsis G. M. Barroso | | a | | Praxeliopsis G. M. Barroso | | Asteraceae |
| Praxelis Cass. | | a | | Praxelis Cass. | | Asteraceae |
| Preauxia Sch. Bip. | Argyranthemum Webb ex Sch. Bip. | | | Preauxia Sch. Bip. | Argyranthemum Webb ex Sch. Bip. | Asteraceae |
| Prenanthella Rydb. | | a | | Prenanthella Rydb. | | Asteraceae |
| Prenanthes L. | | a | | Prenanthes L. | | Asteraceae |
| Prestelia Sch. Bip. | | a | | Prestelia Sch. Bip. | | Asteraceae |
| Printzia Cass. | | a | | Printzia Cass. | | Asteraceae |
| Prionopsis Nutt. | Grindelia Willd. | | | Prionopsis Nutt. | Grindelia Willd. | Asteraceae |
| Prolobus R. M. King & H. Rob. | | a | | Prolobus R. M. King & H. Rob. | | Asteraceae |
| Prolongoa Boiss. | | a | | Prolongoa Boiss. | | Asteraceae |
| Proteopsis Mart. & Zucc. ex Sch. Bip. | | a | | Proteopsis Mart. & Zucc. ex Sch. Bip. | | Asteraceae |
| Proustia Lag. | | a | | Proustia Lag. | | Asteraceae |
| Psacaliopsis H. Rob. & Brettell | | a | | Psacaliopsis H. Rob. & Brettell | | Asteraceae |
| Psacalium Cass. | | a | | Psacalium Cass. | | Asteraceae |
| Psathyrotes A. Gray | | a | | Psathyrotes A. Gray | | Asteraceae |
| Psathyrotopsis Rydb. | | a | | Psathyrotopsis Rydb. | | Asteraceae |
| Psednotrichia Hiern | | a | | Psednotrichia Hiern | | Asteraceae |
| Psephellus Cass. | | a | | Psephellus Cass. | | Asteraceae |
| Pseudactis S. Moore | Emilia Cass. | | | Pseudactis S. Moore | Emilia Cass. | Asteraceae |
| Pseudelephantopus Rohr | | a | | Pseudelephantopus Rohr | | Asteraceae |
| Pseudobaccharis Cabrera | Baccharis L. | | | Pseudobaccharis Cabrera | Baccharis L. | Asteraceae |
| Pseudobahia (A. Gray) Rydb. | | a | | Pseudobahia (A. Gray) Rydb. | | Asteraceae |
| Pseudobartlettia Rydb. | Psathyrotes A. Gray | | | Pseudobartlettia Rydb. | Psathyrotes A. Gray | Asteraceae |
| Pseudoblepharispermum J.-P. Lebrun & Stork | | a | | Pseudoblepharispermum J.-P. Lebrun & Stork | | Asteraceae |
| Pseudobrickellia R. M. King & H. Rob. | | a | | Pseudobrickellia R. M. King & H. Rob. | | Asteraceae |
| Pseudocadiscus Lisowski | | a | | Pseudocadiscus Lisowski | | Asteraceae |
| Pseudoclappia Rydb. | | a | | Pseudoclappia Rydb. | | Asteraceae |
| Pseudoconyza Cuatrec. | | a | | Pseudoconyza Cuatrec. | | Asteraceae |
| Pseudognaphalium Kirp. | | a | | Pseudognaphalium Kirp. | | Asteraceae |
| Pseudogynoxys (Greenm.) Cabrera | | a | | Pseudogynoxys (Greenm.) Cabrera | | Asteraceae |
| Pseudohandelia Tzvelev | | a | | Pseudohandelia Tzvelev | | Asteraceae |
| Pseudojacobaea (Hook. f.) R. Mathur | | a | | Pseudojacobaea (Hook. f.) R. Mathur | | Asteraceae |
| Pseudokyrsteniopsis R. M. King & H. Rob. | | a | | Pseudokyrsteniopsis R. M. King & H. Rob. | | Asteraceae |
| Pseudoligandra M. O. Dillon & Sagást. | Chionolaena DC. | | | Pseudoligandra M. O. Dillon & Sagást. | Chionolaena DC. | Asteraceae |
| Pseudonoseris H. Rob. & Brettell | | a | | Pseudonoseris H. Rob. & Brettell | | Asteraceae |
| Pseudopiptocarpha H. Rob. | | a | | Pseudopiptocarpha H. Rob. | | Asteraceae |
| Pseudostifftia H. Rob. | | a | | Pseudostifftia H. Rob. | | Asteraceae |
| Pseudoyoungia D. Maity & Maiti | | a | | Pseudoyoungia D. Maity & Maiti | | Asteraceae |
| Psiadia Jacq. ex Willd. | | a | | Psiadia Jacq. ex Willd. | | Asteraceae |
| Psiadiella Humbert | | a | | Psiadiella Humbert | | Asteraceae |
| Psila Phil. | Baccharis L. | | | Psila Phil. | Baccharis L. | Asteraceae |
| Psilactis A. Gray | | a | | Psilactis A. Gray | | Asteraceae |
| Psilocarphus Nutt. | | a | | Psilocarphus Nutt. | | Asteraceae |
| Psilostrophe DC. | | a | | Psilostrophe DC. | | Asteraceae |
| Psychrogeton Boiss. | | a | | Psychrogeton Boiss. | | Asteraceae |
| Psychrophyton Beauverd | | a | | Psychrophyton Beauverd | | Asteraceae |
| Ptarmica Hill | Achillea L. | | | Ptarmica Hill | Achillea L. | Asteraceae |
| Pterachaenia (Benth.) Lipsch. | | a | | Pterachaenia (Benth.) Lipsch. | | Asteraceae |
| Pterigeron (DC.) Benth. | Streptoglossa Steetz ex F. Muell. | | | Pterigeron (DC.) Benth. | Streptoglossa Steetz ex F. Muell. | Asteraceae |
| Pterocaulon Elliott | | a | | Pterocaulon Elliott | | Asteraceae |
| Pterocypsela C. Shih | Lactuca L. | | | Pterocypsela C. Shih | Lactuca L. | Asteraceae |
| Pterochaeta Steetz | | a | | Pterochaeta Steetz | | Asteraceae |
| Pteronia L. | | a | | Pteronia L. | | Asteraceae |
| Pteropogon DC. | Rhodanthe Lindl. | | | Pteropogon DC. | Rhodanthe Lindl. | Asteraceae |
| Pterothrix DC. | Amphiglossa DC. | | | Pterothrix DC. | Amphiglossa DC. | Asteraceae |
| Pterygopappus Hook. f. | | a | | Pterygopappus Hook. f. | | Asteraceae |
| Ptilepida Raf. | Helenium L. | | | Ptilepida Raf. | Helenium L. | Asteraceae |
| Ptilocalais Torr. ex Greene | Microseris D. Don | | | Ptilocalais Torr. ex Greene | Microseris D. Don | Asteraceae |
| Ptiloria Raf. | Stephanomeria Nutt. | | | Ptiloria Raf. | Stephanomeria Nutt. | Asteraceae |
| Ptilostemon Cass. | | a | | Ptilostemon Cass. | | Asteraceae |
| Pugiopappus A. Gray | Coreopsis L. | | | Pugiopappus A. Gray | Coreopsis L. | Asteraceae |
| Pulicaria Gaertn. | | a | | Pulicaria Gaertn. | | Asteraceae |
| Pycnocephalum (Less.) DC. | Chresta Vell. ex DC. | | | Pycnocephalum (Less.) DC. | Chresta Vell. ex DC. | Asteraceae |
| Pycnosorus Benth. | | a | | Pycnosorus Benth. | | Asteraceae |
| Pyrethrum Medik. | Tanacetum L. | | | Pyrethrum Medik. | Tanacetum L. | Asteraceae |
| Pyrethrum Zinn | Tanacetum L. | | | Pyrethrum Zinn | Tanacetum L. | Asteraceae |
| Pyrrhopappus DC. | | a | | Pyrrhopappus DC. | | Asteraceae |
| Pyrrocoma Hook. | | a | | Pyrrocoma Hook. | | Asteraceae |
| Pytinicarpa G. L. Nesom | | a | | Pytinicarpa G. L. Nesom | | Asteraceae |
| Quechualia H. Rob. | | a | | Quechualia H. Rob. | | Asteraceae |
| Quelchia N. E. Br. | | a | | Quelchia N. E. Br. | | Asteraceae |
| Quinetia Cass. | | a | | Quinetia Cass. | | Asteraceae |
| Quinqueremulus Paul G. Wilson | | a | | Quinqueremulus Paul G. Wilson | | Asteraceae |
| Radlkoferotoma Kuntze | | a | | Radlkoferotoma Kuntze | | Asteraceae |
| Rafinesquia Nutt. | | a | | Rafinesquia Nutt. | | Asteraceae |
| Rachelia J. M. Ward & Breitw. | | a | | Rachelia J. M. Ward & Breitw. | | Asteraceae |
| Raillardella (A. Gray) Benth. | | a | | Raillardella (A. Gray) Benth. | | Asteraceae |
| Raillardia Gaudich. | Dubautia Gaudich. | | | Raillardia Gaudich. | Dubautia Gaudich. | Asteraceae |
| Raillardiopsis Rydb. | Anisocarpus Nutt. | | | Raillardiopsis Rydb. | Anisocarpus Nutt. | Asteraceae |
| Railliardia Gaudich. | Dubautia Gaudich. | | | Railliardia Gaudich. | Dubautia Gaudich. | Asteraceae |
| ×Railliautia Sherff | Dubautia Gaudich. | | | Railliautia Sherff | Dubautia Gaudich. | Asteraceae |
| Rainiera Greene | | a | | Rainiera Greene | | Asteraceae |
| Ramaliella Zaika et al. | | a | | Ramaliella Zaika et al. | | Asteraceae |
| Raoulia Hook. f. ex Raoul | | a | | Raoulia Hook. f. ex Raoul | | Asteraceae |
| Raouliopsis S. F. Blake | | a | | Raouliopsis S. F. Blake | | Asteraceae |
| Rastrophyllum Wild & G. V. Pope | | a | | Rastrophyllum Wild & G. V. Pope | | Asteraceae |
| Ratibida Raf. | | a | | Ratibida Raf. | | Asteraceae |
| Raulinoreitzia R. M. King & H. Rob. | | a | | Raulinoreitzia R. M. King & H. Rob. | | Asteraceae |
| Rayjacksonia R. L. Hartm. & M. A. Lane | | a | | Rayjacksonia R. L. Hartm. & M. A. Lane | | Asteraceae |
| Rea Bertero ex Decne. | Dendroseris D. Don | | | Rea Bertero ex Decne. | Dendroseris D. Don | Asteraceae |
| Reichardia Roth | | a | | Reichardia Roth | | Asteraceae |
| Relhania LʼHér. | | a | | Relhania LʼHér. | | Asteraceae |
| Remya Hillebr. ex Benth. & Hook. f. | | a | | Remya Hillebr. ex Benth. & Hook. f. | | Asteraceae |
| Rennera Merxm. | | a | | Rennera Merxm. | | Asteraceae |
| Rensonia S. F. Blake | | a | | Rensonia S. F. Blake | | Asteraceae |
| Revealia R. M. King & H. Rob. | Carphochaete A. Gray | | | Revealia R. M. King & H. Rob. | Carphochaete A. Gray | Asteraceae |
| Rhagadiolus Juss. | | a | | Rhagadiolus Juss. | | Asteraceae |
| Rhamphogyne S. Moore | | a | | Rhamphogyne S. Moore | | Asteraceae |
| Rhanteriopsis Rauschert | | a | | Rhanteriopsis Rauschert | | Asteraceae |
| Rhanterium Desf. | | a | | Rhanterium Desf. | | Asteraceae |
| Rhaponticoides Vaill. | | a | | Rhaponticoides Vaill. | | Asteraceae |
| Rhaponticum Ludw. | | a | | Rhaponticum Ludw. | | Asteraceae |
| Rhetinodendron Meisn. | Senecio L. | | | Rhetinodendron Meisn. | Senecio L. | Asteraceae |
| Rhetinolepis Coss. | | a | | Rhetinolepis Coss. | | Asteraceae |
| Rhodanthe Lindl. | | a | | Rhodanthe Lindl. | | Asteraceae |
| Rhodanthemum (Vogt) B. H. Wilcox et al. | | a | | Rhodanthemum (Vogt) B. H. Wilcox et al. | | Asteraceae |
| Rhodogeron Griseb. | | a | | Rhodogeron Griseb. | | Asteraceae |
| Rhynea DC. | Tenrhynea Hilliard & B. L. Burtt | | | Rhynea DC. | Tenrhynea Hilliard & B. L. Burtt | Asteraceae |
| Rhynchopsidium DC. | | a | | Rhynchopsidium DC. | | Asteraceae |
| Rhynchospermum Reinw. | | a | | Rhynchospermum Reinw. | | Asteraceae |
| Rhysolepis S. F. Blake | | a | | Rhysolepis S. F. Blake | | Asteraceae |
| Riddellia Nutt. | Psilostrophe DC. | | | Riddellia Nutt. | Psilostrophe DC. | Asteraceae |
| Riencourtia Cass. | | a | | Riencourtia Cass. | | Asteraceae |
| Rigiopappus A. Gray | | a | | Rigiopappus A. Gray | | Asteraceae |
| Richea Labill. | Craspedia G. Forst. | | | Richea Labill. | Craspedia G. Forst. | Asteraceae |
| Richterago Kuntze | | a | | Richterago Kuntze | | Asteraceae |
| Richteria Kar. & Kir. | | a | | Richteria Kar. & Kir. | | Asteraceae |
| Robinsonecio T. M. Barkley & Janovec | | a | | Robinsonecio T. M. Barkley & Janovec | | Asteraceae |
| Robinsonia DC. | Senecio L. | | | Robinsonia DC. | Senecio L. | Asteraceae |
| Rohria Vahl | Berkheya Ehrh. | | | Rohria Vahl | Berkheya Ehrh. | Asteraceae |
| Rochonia DC. | | a | | Rochonia DC. | | Asteraceae |
| Rojasianthe Standl. & Steyerm. | | a | | Rojasianthe Standl. & Steyerm. | | Asteraceae |
| Rolandra Rottb. | | a | | Rolandra Rottb. | | Asteraceae |
| Roldana La Llave | | a | | Roldana La Llave | | Asteraceae |
| Roodebergia B. Nord. | | a | | Roodebergia B. Nord. | | Asteraceae |
| Rosenia Thunb. | | a | | Rosenia Thunb. | | Asteraceae |
| Rosilla Less. | Dyssodia Cav. | | | Rosilla Less. | Dyssodia Cav. | Asteraceae |
| Rothmaleria Font Quer | | a | | Rothmaleria Font Quer | | Asteraceae |
| Rudbeckia L. | | a | | Rudbeckia L. | | Asteraceae |
| Rudbeckia L. sect. Dracopis | | a | i | Rudbeckia L. sect. Dracopis | | Asteraceae |
| Rudbeckia L. sect. Macrocline | | a | i | Rudbeckia L. sect. Macrocline | | Asteraceae |
| Rudbeckia L. sect. Rudbeckia | | a | i | Rudbeckia L. sect. Rudbeckia | | Asteraceae |
| Rugelia Shuttlew. ex Chapm. | | a | | Rugelia Shuttlew. ex Chapm. | | Asteraceae |
| Ruilopezia Cuatrec. | | a | | Ruilopezia Cuatrec. | | Asteraceae |
| Rumfordia DC. | | a | | Rumfordia DC. | | Asteraceae |
| Russowia C. Winkl. | | a | | Russowia C. Winkl. | | Asteraceae |
| Rutidosis DC. | | a | | Rutidosis DC. | | Asteraceae |
| Sabazia Cass. | | a | | Sabazia Cass. | | Asteraceae |
| Sachsia Griseb. | | a | | Sachsia Griseb. | | Asteraceae |
| Salcedoa Jiménez Rodr. & Katinas | | a | | Salcedoa Jiménez Rodr. & Katinas | | Asteraceae |
| Salmea DC. | | a | | Salmea DC. | | Asteraceae |
| Salmeopsis Benth. | Salmea DC. | | | Salmeopsis Benth. | Salmea DC. | Asteraceae |
| Sampera V. A. Funk & H. Rob. | | a | | Sampera V. A. Funk & H. Rob. | | Asteraceae |
| Santolina L. | | a | | Santolina L. | | Asteraceae |
| Santosia R. M. King & H. Rob. | | a | | Santosia R. M. King & H. Rob. | | Asteraceae |
| Sanvitalia Lam. | | a | | Sanvitalia Lam. | | Asteraceae |
| Sarcanthemum Cass. | | a | | Sarcanthemum Cass. | | Asteraceae |
| Sartorina R. M. King & H. Rob. | | a | | Sartorina R. M. King & H. Rob. | | Asteraceae |
| Sartwellia A. Gray | | a | | Sartwellia A. Gray | | Asteraceae |
| Saussurea DC. | | a | | Saussurea DC. | | Asteraceae |
| Scabrethia W. A. Weber | | a | | Scabrethia W. A. Weber | | Asteraceae |
| Scalesia Arn. | | a | | Scalesia Arn. | | Asteraceae |
| Scalia Sims | Podolepis Labill. | | | Scalia Sims | Podolepis Labill. | Asteraceae |
| Scariola F. W. Schmidt | Lactuca L. | | | Scariola F. W. Schmidt | Lactuca L. | Asteraceae |
| Sciadocephala Mattf. | | a | | Sciadocephala Mattf. | | Asteraceae |
| Sclerocarpus Jacq. | | a | | Sclerocarpus Jacq. | | Asteraceae |
| Sclerolepis Cass. | | a | | Sclerolepis Cass. | | Asteraceae |
| Sclerorhachis (Rech. f.) Rech. f. | | a | | Sclerorhachis (Rech. f.) Rech. f. | | Asteraceae |
| Sclerostephane Chiov. | | a | | Sclerostephane Chiov. | | Asteraceae |
| Scolymus L. | | a | | Scolymus L. | | Asteraceae |
| Scorzonella Nutt. | Microseris D. Don | | | Scorzonella Nutt. | Microseris D. Don | Asteraceae |
| Scorzonera L. | | a | | Scorzonera L. | | Asteraceae |
| Scorzoneroides Moench | | a | | Scorzoneroides Moench | | Asteraceae |
| Scrobicaria Cass. | | a | | Scrobicaria Cass. | | Asteraceae |
| Scyphocoronis A. Gray | Millotia Cass. | | | Scyphocoronis A. Gray | Millotia Cass. | Asteraceae |
| Scyphopappus B. Nord. | Argyranthemum Webb ex Sch. Bip. | | | Scyphopappus B. Nord. | Argyranthemum Webb ex Sch. Bip. | Asteraceae |
| Selleophytum Urb. | Coreopsis L. | | | Selleophytum Urb. | Coreopsis L. | Asteraceae |
| Selloa Kunth | | a | | Selloa Kunth | | Asteraceae |
| Senecillis Gaertn. | Ligularia Cass. | | | Senecillis Gaertn. | Ligularia Cass. | Asteraceae |
| Senecio L. | | a | | Senecio L. | | Asteraceae |
| Senecioides Britton & P. Wilson | Cyanthillium Blume | | | Senecioides Britton & P. Wilson | Cyanthillium Blume | Asteraceae |
| ×Senecurio Gideon F. Sm. & Figueiredo | | a | | Senecurio Gideon F. Sm. & Figueiredo | | Asteraceae |
| Sericocarpus Nees | | a | | Sericocarpus Nees | | Asteraceae |
| Seridia Juss. | Centaurea L. | | | Seridia Juss. | Centaurea L. | Asteraceae |
| Serinia Raf. | Krigia Schreb. | | | Serinia Raf. | Krigia Schreb. | Asteraceae |
| Seriola L. | Hypochaeris L. | | | Seriola L. | Hypochaeris L. | Asteraceae |
| Seriphidium (Besser ex Hook.) Fourr. | Artemisia L. | | | Seriphidium (Besser ex Hook.) Fourr. | Artemisia L. | Asteraceae |
| Serratula L. | | a | | Serratula L. | | Asteraceae |
| Shafera Greenm. | | a | | Shafera Greenm. | | Asteraceae |
| Shangwua Yu J. Wang et al. | | a | | Shangwua Yu J. Wang et al. | | Asteraceae |
| Shawia J. R. Forst. & G. Forst. | Olearia Moench | | | Shawia J. R. Forst. & G. Forst. | Olearia Moench | Asteraceae |
| Sheareria S. Moore | | a | | Sheareria S. Moore | | Asteraceae |
| Shinnersia R. M. King & H. Rob. | | a | | Shinnersia R. M. King & H. Rob. | | Asteraceae |
| Shinnersoseris Tomb | | a | | Shinnersoseris Tomb | | Asteraceae |
| Schaetzellia Sch. Bip. | Macvaughiella R. M. King & H. Rob. | | | Schaetzellia Sch. Bip. | Macvaughiella R. M. King & H. Rob. | Asteraceae |
| Scherya R. M. King & H. Rob. | | a | | Scherya R. M. King & H. Rob. | | Asteraceae |
| Schischkinia Iljin | | a | | Schischkinia Iljin | | Asteraceae |
| Schistocarpha Less. | | a | | Schistocarpha Less. | | Asteraceae |
| Schistostephium Less. | | a | | Schistostephium Less. | | Asteraceae |
| Schizogyne Cass. | | a | | Schizogyne Cass. | | Asteraceae |
| Schizophyllum Nutt. | Lipochaeta DC. | | | Schizophyllum Nutt. | Lipochaeta DC. | Asteraceae |
| Schizopsera Turcz., orth. var. | Schizoptera Turcz. | | | Schizopsera Turcz., orth. var. | Schizoptera Turcz. | Asteraceae |
| Schizoptera Turcz. | | a | | Schizoptera Turcz. | | Asteraceae |
| Schizotrichia Benth. | | a | | Schizotrichia Benth. | | Asteraceae |
| Schkuhria Roth | | a | | Schkuhria Roth | | Asteraceae |
| Schlagintweitia Griseb. | | a | | Schlagintweitia Griseb. | | Asteraceae |
| Schlechtendalia Less. | | a | | Schlechtendalia Less. | | Asteraceae |
| Schmalhausenia C. Winkl. | | a | | Schmalhausenia C. Winkl. | | Asteraceae |
| Schoenia Steetz | | a | | Schoenia Steetz | | Asteraceae |
| Schumeria Iljin | Serratula L. | | | Schumeria Iljin | Serratula L. | Asteraceae |
| Siapaea Pruski | | a | | Siapaea Pruski | | Asteraceae |
| Sideranthus Nutt. ex Nees | Machaeranthera Nees | | | Sideranthus Nutt. ex Nees | Machaeranthera Nees | Asteraceae |
| Sidneya E. E. Schill. & Panero | | a | | Sidneya E. E. Schill. & Panero | | Asteraceae |
| Siebera J. Gay | | a | | Siebera J. Gay | | Asteraceae |
| Siegesbeckia Steud., orth. var. | Sigesbeckia L. | | | Siegesbeckia Steud., orth. var. | Sigesbeckia L. | Asteraceae |
| Sigesbeckia L. | | a | | Sigesbeckia L. | | Asteraceae |
| Siloxerus Labill. | | a | | Siloxerus Labill. | | Asteraceae |
| Silphium L. | | a | | Silphium L. | | Asteraceae |
| Silybum Adans. | | a | | Silybum Adans. | | Asteraceae |
| Simsia Pers. | | a | | Simsia Pers. | | Asteraceae |
| Sinacalia H. Rob. & Brettell | | a | | Sinacalia H. Rob. & Brettell | | Asteraceae |
| Sinclairia Hook. & Arn. | | a | | Sinclairia Hook. & Arn. | | Asteraceae |
| Sinclairiopsis Rydb. | Sinclairia Hook. & Arn. | | | Sinclairiopsis Rydb. | Sinclairia Hook. & Arn. | Asteraceae |
| Sinoleontopodium Y. L. Chen | | a | | Sinoleontopodium Y. L. Chen | | Asteraceae |
| Sinosenecio B. Nord. | | a | | Sinosenecio B. Nord. | | Asteraceae |
| Sinoseris N. Kilian et al. | | a | | Sinoseris N. Kilian et al. | | Asteraceae |
| Sipolisia Glaz. ex Oliv. | | a | | Sipolisia Glaz. ex Oliv. | | Asteraceae |
| Sitilias Raf. | Pyrrhopappus DC. | | | Sitilias Raf. | Pyrrhopappus DC. | Asteraceae |
| Smallanthus Mack. ex Small | | a | | Smallanthus Mack. ex Small | | Asteraceae |
| Soaresia Sch. Bip. | | a | | Soaresia Sch. Bip. | | Asteraceae |
| Solanecio (Sch. Bip.) Walp. | | a | | Solanecio (Sch. Bip.) Walp. | | Asteraceae |
| Solenogyne Cass. | | a | | Solenogyne Cass. | | Asteraceae |
| Solidago L. | | a | | Solidago L. | | Asteraceae |
| ×Solidaster H. R. Wehrh. | | a | | Solidaster H. R. Wehrh. | | Asteraceae |
| Soliva Ruiz & Pav. | | a | | Soliva Ruiz & Pav. | | Asteraceae |
| Sommerfeltia Less. | | a | | Sommerfeltia Less. | | Asteraceae |
| Sondottia P. S. Short | | a | | Sondottia P. S. Short | | Asteraceae |
| Sonchella Sennikov | | a | | Sonchella Sennikov | | Asteraceae |
| Sonchus L. | | a | | Sonchus L. | | Asteraceae |
| Soroseris Stebbins | | a | | Soroseris Stebbins | | Asteraceae |
| Spaniopappus B. L. Rob. | | a | | Spaniopappus B. L. Rob. | | Asteraceae |
| Sparganophoros Boehm. | Struchium P. Browne | | | Sparganophoros Boehm. | Struchium P. Browne | Asteraceae |
| Spathipappus Tzvelev | Tanacetum L. | | | Spathipappus Tzvelev | Tanacetum L. | Asteraceae |
| Sphacophyllum Benth. | Anisopappus Hook. & Arn. | | | Sphacophyllum Benth. | Anisopappus Hook. & Arn. | Asteraceae |
| Sphaeranthus L. | | a | | Sphaeranthus L. | | Asteraceae |
| Sphaereupatorium (O. Hoffm.) Kuntze ex B. L. Rob. | | a | | Sphaereupatorium (O. Hoffm.) Kuntze ex B. L. Rob. | | Asteraceae |
| Sphaeroclinium (DC.) Sch. Bip. | Cotula L. | | | Sphaeroclinium (DC.) Sch. Bip. | Cotula L. | Asteraceae |
| Sphaeromeria Nutt. | | a | | Sphaeromeria Nutt. | | Asteraceae |
| Sphaeromorphaea DC. | Epaltes Cass. | | | Sphaeromorphaea DC. | Epaltes Cass. | Asteraceae |
| Sphagneticola O. Hoffm. | | a | | Sphagneticola O. Hoffm. | | Asteraceae |
| Sphenogyne R. Br. | Ursinia Gaertn. | | | Sphenogyne R. Br. | Ursinia Gaertn. | Asteraceae |
| Spilanthes Jacq. | | a | | Spilanthes Jacq. | | Asteraceae |
| Spinoliva G. Sancho et al. | | a | | Spinoliva G. Sancho et al. | | Asteraceae |
| Spiracantha Kunth | | a | | Spiracantha Kunth | | Asteraceae |
| Spiroseris Rech. f. | | a | | Spiroseris Rech. f. | | Asteraceae |
| Squamopappus R. K. Jansen et al. | | a | | Squamopappus R. K. Jansen et al. | | Asteraceae |
| Staehelina L. | | a | | Staehelina L. | | Asteraceae |
| Stachycephalum Sch. Bip. ex Benth. | | a | | Stachycephalum Sch. Bip. ex Benth. | | Asteraceae |
| Standleyanthus R. M. King & H. Rob. | | a | | Standleyanthus R. M. King & H. Rob. | | Asteraceae |
| Staurochlamys Baker | | a | | Staurochlamys Baker | | Asteraceae |
| Stebbinsoseris K. L. Chambers | | a | | Stebbinsoseris K. L. Chambers | | Asteraceae |
| Steiractinia S. F. Blake | | a | | Steiractinia S. F. Blake | | Asteraceae |
| Steirodiscus Less. | | a | | Steirodiscus Less. | | Asteraceae |
| Steiroglossa DC. | Brachyscome Cass. | | | Steiroglossa DC. | Brachyscome Cass. | Asteraceae |
| Steleocodon Gilli | Phalacraea DC. | | | Steleocodon Gilli | Phalacraea DC. | Asteraceae |
| Stemmacantha Cass. | Rhaponticum Ludw. | | | Stemmacantha Cass. | Rhaponticum Ludw. | Asteraceae |
| Stemmatella Wedd. ex Benth. | Galinsoga Ruiz & Pav. | | | Stemmatella Wedd. ex Benth. | Galinsoga Ruiz & Pav. | Asteraceae |
| Stenactis Cass. | Erigeron L. | | | Stenactis Cass. | Erigeron L. | Asteraceae |
| Stenachaenium Benth. | | a | | Stenachaenium Benth. | | Asteraceae |
| Stengelia (Walp.) Sch. Bip. ex Steetz | Vernonia Schreb. | | | Stengelia (Walp.) Sch. Bip. ex Steetz | Vernonia Schreb. | Asteraceae |
| Stenocarpha S. F. Blake | | a | | Stenocarpha S. F. Blake | | Asteraceae |
| Stenocephalum Sch. Bip. | | a | | Stenocephalum Sch. Bip. | | Asteraceae |
| Stenocline DC. | | a | | Stenocline DC. | | Asteraceae |
| Stenopadus S. F. Blake | | a | | Stenopadus S. F. Blake | | Asteraceae |
| Stenophalium Anderb. | | a | | Stenophalium Anderb. | | Asteraceae |
| Stenops B. Nord. | | a | | Stenops B. Nord. | | Asteraceae |
| Stenoseris C. Shih | Melanoseris Decne. | | | Stenoseris C. Shih | Melanoseris Decne. | Asteraceae |
| Stenotopsis Rydb. | Ericameria Nutt. | | | Stenotopsis Rydb. | Ericameria Nutt. | Asteraceae |
| Stenotus Nutt. | | a | | Stenotus Nutt. | | Asteraceae |
| Stephanbeckia H. Rob. & V. A. Funk | | a | | Stephanbeckia H. Rob. & V. A. Funk | | Asteraceae |
| Stephanodoria Greene | | a | | Stephanodoria Greene | | Asteraceae |
| Stephanochilus Coss. & Durieu ex Maire | | a | | Stephanochilus Coss. & Durieu ex Maire | | Asteraceae |
| Stephanolepis S. Moore | Erlangea Sch. Bip. | | | Stephanolepis S. Moore | Erlangea Sch. Bip. | Asteraceae |
| Stephanomeria Nutt. | | a | | Stephanomeria Nutt. | | Asteraceae |
| Stephanopholis S. F. Blake | Chromolepis Benth. | | | Stephanopholis S. F. Blake | Chromolepis Benth. | Asteraceae |
| Steptorhamphus Bunge | Lactuca L. | | | Steptorhamphus Bunge | Lactuca L. | Asteraceae |
| Stevia Cav. | | a | | Stevia Cav. | | Asteraceae |
| Steviopsis R. M. King & H. Rob. | | a | | Steviopsis R. M. King & H. Rob. | | Asteraceae |
| Steyermarkina R. M. King & H. Rob. | | a | | Steyermarkina R. M. King & H. Rob. | | Asteraceae |
| Stifftia J. C. Mikan | | a | | Stifftia J. C. Mikan | | Asteraceae |
| Stilpnogyne DC. | | a | | Stilpnogyne DC. | | Asteraceae |
| Stilpnolepis Krasch. | | a | | Stilpnolepis Krasch. | | Asteraceae |
| Stilpnopappus Mart. ex DC. | | a | | Stilpnopappus Mart. ex DC. | | Asteraceae |
| Stilpnophyton Less. | Athanasia L. | | | Stilpnophyton Less. | Athanasia L. | Asteraceae |
| Stilpnophytum Less., orth. var. | Athanasia L. | | | Stilpnophytum Less., orth. var. | Athanasia L. | Asteraceae |
| Stizolophus Cass. | | a | | Stizolophus Cass. | | Asteraceae |
| Stobaea Thunb. | Berkheya Ehrh. | | | Stobaea Thunb. | Berkheya Ehrh. | Asteraceae |
| Stoebe L. | | a | | Stoebe L. | | Asteraceae |
| Stokesia LʼHér. | | a | | Stokesia LʼHér. | | Asteraceae |
| Stomatanthes R. M. King & H. Rob. | | a | | Stomatanthes R. M. King & H. Rob. | | Asteraceae |
| Stomatochaeta (S. F. Blake) Maguire & Wurdack | | a | | Stomatochaeta (S. F. Blake) Maguire & Wurdack | | Asteraceae |
| Stramentopappus H. Rob. & V. A. Funk | | a | | Stramentopappus H. Rob. & V. A. Funk | | Asteraceae |
| Streptoglossa Steetz ex F. Muell. | | a | | Streptoglossa Steetz ex F. Muell. | | Asteraceae |
| Strobocalyx (Blume ex DC.) Spach | | a | | Strobocalyx (Blume ex DC.) Spach | | Asteraceae |
| Strophopappus DC. | Stilpnopappus Mart. ex DC. | | | Strophopappus DC. | Stilpnopappus Mart. ex DC. | Asteraceae |
| Strotheria B. L. Turner | | a | | Strotheria B. L. Turner | | Asteraceae |
| Struchium P. Browne | | a | | Struchium P. Browne | | Asteraceae |
| Stuartina Sond. | | a | | Stuartina Sond. | | Asteraceae |
| Stuckertiella Beauverd | | a | | Stuckertiella Beauverd | | Asteraceae |
| Stuessya B. L. Turner & F. G. Davies | | a | | Stuessya B. L. Turner & F. G. Davies | | Asteraceae |
| Stylocline Nutt. | | a | | Stylocline Nutt. | | Asteraceae |
| Stylopappus Nutt. | Agoseris Raf. | | | Stylopappus Nutt. | Agoseris Raf. | Asteraceae |
| Stylotrichium Mattf. | | a | | Stylotrichium Mattf. | | Asteraceae |
| Sventenia Font Quer | | a | | Sventenia Font Quer | | Asteraceae |
| Swammerdamia DC. | Ozothamnus R. Br. | | | Swammerdamia DC. | Ozothamnus R. Br. | Asteraceae |
| Symphyllocarpus Maxim. | | a | | Symphyllocarpus Maxim. | | Asteraceae |
| Symphyochaeta (DC.) Skottsb. | Senecio L. | | | Symphyochaeta (DC.) Skottsb. | Senecio L. | Asteraceae |
| Symphyopappus Turcz. | | a | | Symphyopappus Turcz. | | Asteraceae |
| Symphyotrichum Nees | | a | | Symphyotrichum Nees | | Asteraceae |
| Syncalathium Lipsch. | | a | | Syncalathium Lipsch. | | Asteraceae |
| Syncarpha DC. | | a | | Syncarpha DC. | | Asteraceae |
| Syncephalum DC. | | a | | Syncephalum DC. | | Asteraceae |
| Syncretocarpus S. F. Blake | | a | | Syncretocarpus S. F. Blake | | Asteraceae |
| Synedrella Gaertn. | | a | | Synedrella Gaertn. | | Asteraceae |
| Synedrellopsis Hieron. & Kuntze | | a | | Synedrellopsis Hieron. & Kuntze | | Asteraceae |
| Syneilesis Maxim. | | a | | Syneilesis Maxim. | | Asteraceae |
| Synosma Raf. ex Britton & A. Br. | Senecio L. | | | Synosma Raf. ex Britton & A. Br. | Senecio L. | Asteraceae |
| Synotis (C. B. Clarke) C. Jeffrey & Y. L. Chen | | a | | Synotis (C. B. Clarke) C. Jeffrey & Y. L. Chen | | Asteraceae |
| Syntrichopappus A. Gray | | a | | Syntrichopappus A. Gray | | Asteraceae |
| Synurus Iljin | | a | | Synurus Iljin | | Asteraceae |
| Syreitschikovia Pavlov | | a | | Syreitschikovia Pavlov | | Asteraceae |
| Taeckholmia Boulos | | a | | Taeckholmia Boulos | | Asteraceae |
| Tagetes L. | | a | | Tagetes L. | | Asteraceae |
| Taimingasa (Kitam.) C. Ren & Q. E. Yang | | a | | Taimingasa (Kitam.) C. Ren & Q. E. Yang | | Asteraceae |
| Takeikadzuchia Kitag. & Kitam. | Olgaea Iljin | | | Takeikadzuchia Kitag. & Kitam. | Olgaea Iljin | Asteraceae |
| Takhtajaniantha Nazarova | | a | | Takhtajaniantha Nazarova | | Asteraceae |
| Takhtajanianthus A. B. De | Rhanteriopsis Rauschert | | | Takhtajanianthus A. B. De | Rhanteriopsis Rauschert | Asteraceae |
| Talamancalia H. Rob. & Cuatrec. | | a | | Talamancalia H. Rob. & Cuatrec. | | Asteraceae |
| Tamananthus V. M. Badillo | | a | | Tamananthus V. M. Badillo | | Asteraceae |
| Tamania Cuatrec. | | a | | Tamania Cuatrec. | | Asteraceae |
| Tamaulipa R. M. King & H. Rob. | | a | | Tamaulipa R. M. King & H. Rob. | | Asteraceae |
| Tanacetopsis (Tzvelev) Kovalevsk. | | a | | Tanacetopsis (Tzvelev) Kovalevsk. | | Asteraceae |
| Tanacetum L. | | a | | Tanacetum L. | | Asteraceae |
| Taplinia Lander | | a | | Taplinia Lander | | Asteraceae |
| Taraxacum F. H. Wigg. | | a | | Taraxacum F. H. Wigg. | | Asteraceae |
| Tarchonanthus L. | | a | | Tarchonanthus L. | | Asteraceae |
| Tarlmounia H. Rob. et al. | | a | | Tarlmounia H. Rob. et al. | | Asteraceae |
| Tehuana Panero & Villaseñor | | a | | Tehuana Panero & Villaseñor | | Asteraceae |
| Teixeiranthus R. M. King & H. Rob. | | a | | Teixeiranthus R. M. King & H. Rob. | | Asteraceae |
| Telanthophora H. Rob. & Brettell | | a | | Telanthophora H. Rob. & Brettell | | Asteraceae |
| Telekia Baumg. | | a | | Telekia Baumg. | | Asteraceae |
| Telmatophila Mart. ex Baker | | a | | Telmatophila Mart. ex Baker | | Asteraceae |
| Tenrhynea Hilliard & B. L. Burtt | | a | | Tenrhynea Hilliard & B. L. Burtt | | Asteraceae |
| Tephroseris (Rchb.) Rchb. | | a | | Tephroseris (Rchb.) Rchb. | | Asteraceae |
| Tephrothamnus Sch. Bip. | | a | | Tephrothamnus Sch. Bip. | | Asteraceae |
| Tessaria Ruiz & Pav. | | a | | Tessaria Ruiz & Pav. | | Asteraceae |
| Tetracarpum Moench | Schkuhria Roth | | | Tetracarpum Moench | Schkuhria Roth | Asteraceae |
| Tetradymia DC. | | a | | Tetradymia DC. | | Asteraceae |
| Tetragonotheca L. | | a | | Tetragonotheca L. | | Asteraceae |
| Tetrachyron Schltdl. | | a | | Tetrachyron Schltdl. | | Asteraceae |
| Tetramolopium Nees | | a | | Tetramolopium Nees | | Asteraceae |
| Tetraneuris Greene | | a | | Tetraneuris Greene | | Asteraceae |
| Tetranthus Sw. | | a | | Tetranthus Sw. | | Asteraceae |
| Tetraperone Urb. | | a | | Tetraperone Urb. | | Asteraceae |
| Thaminophyllum Harv. | | a | | Thaminophyllum Harv. | | Asteraceae |
| Thamnoseris F. Phil. | | a | | Thamnoseris F. Phil. | | Asteraceae |
| Thelechitonia Cuatrec. | Sphagneticola O. Hoffm. | | | Thelechitonia Cuatrec. | Sphagneticola O. Hoffm. | Asteraceae |
| Thelesperma Less. | | a | | Thelesperma Less. | | Asteraceae |
| Thespidium F. Muell. ex Benth. | | a | | Thespidium F. Muell. ex Benth. | | Asteraceae |
| Thespis DC. | | a | | Thespis DC. | | Asteraceae |
| Thevenotia DC. | | a | | Thevenotia DC. | | Asteraceae |
| Thiseltonia Hemsl. | | a | | Thiseltonia Hemsl. | | Asteraceae |
| Thorelia Gagnep. | Camchaya Gagnep. | | | Thorelia Gagnep. | Camchaya Gagnep. | Asteraceae |
| Thrincia Roth | Leontodon L. | | | Thrincia Roth | Leontodon L. | Asteraceae |
| Thurovia Rose | | a | | Thurovia Rose | | Asteraceae |
| Thymophylla Lag. | | a | | Thymophylla Lag. | | Asteraceae |
| Thymopsis Benth. | | a | | Thymopsis Benth. | | Asteraceae |
| Tiarocarpus Rech. f. | Cousinia Cass. | | | Tiarocarpus Rech. f. | Cousinia Cass. | Asteraceae |
| Tibestina Maire | Dicoma Cass. | | | Tibestina Maire | Dicoma Cass. | Asteraceae |
| Tibetoseris Sennikov | | a | | Tibetoseris Sennikov | | Asteraceae |
| Tietkensia P. S. Short | | a | | Tietkensia P. S. Short | | Asteraceae |
| Tilesia G. Mey. | | a | | Tilesia G. Mey. | | Asteraceae |
| Tisserantia Humbert | Sphaeranthus L. | | | Tisserantia Humbert | Sphaeranthus L. | Asteraceae |
| Tithonia Desf. ex Juss. | | a | | Tithonia Desf. ex Juss. | | Asteraceae |
| Toiyabea R. P. Roberts et al. | | a | | Toiyabea R. P. Roberts et al. | | Asteraceae |
| Tolbonia Kuntze | Calotis R. Br. | | | Tolbonia Kuntze | Calotis R. Br. | Asteraceae |
| Tolpis Adans. | | a | | Tolpis Adans. | | Asteraceae |
| Tomentaurum G. L. Nesom | | a | | Tomentaurum G. L. Nesom | | Asteraceae |
| Tonalanthus Brandegee | Calea L. | | | Tonalanthus Brandegee | Calea L. | Asteraceae |
| Tonestus A. Nelson | | a | | Tonestus A. Nelson | | Asteraceae |
| Tourneuxia Coss. | | a | | Tourneuxia Coss. | | Asteraceae |
| Townsendia Hook. | | a | | Townsendia Hook. | | Asteraceae |
| Toxanthes Turcz. | Millotia Cass. | | | Toxanthes Turcz. | Millotia Cass. | Asteraceae |
| Tracyina S. F. Blake | | a | | Tracyina S. F. Blake | | Asteraceae |
| Tragoceros Kunth | Zinnia L. | | | Tragoceros Kunth | Zinnia L. | Asteraceae |
| Tragopogon L. | | a | | Tragopogon L. | | Asteraceae |
| Traversia Hook. f. | | a | | Traversia Hook. f. | | Asteraceae |
| Trepadonia H. Rob. | | a | | Trepadonia H. Rob. | | Asteraceae |
| Tridactylina (DC.) Sch. Bip. | | a | | Tridactylina (DC.) Sch. Bip. | | Asteraceae |
| Tridax L. | | a | | Tridax L. | | Asteraceae |
| Trigonopterum Hook. f. | | a | | Trigonopterum Hook. f. | | Asteraceae |
| Trigonospermum Less. | | a | | Trigonospermum Less. | | Asteraceae |
| Trichanthemis Regel & Schmalh. | | a | | Trichanthemis Regel & Schmalh. | | Asteraceae |
| Trichanthodium Sond. & F. Muell. | | a | | Trichanthodium Sond. & F. Muell. | | Asteraceae |
| Trichapium Gilli | Clibadium F. Allam. ex L. | | | Trichapium Gilli | Clibadium F. Allam. ex L. | Asteraceae |
| Trichocline Cass. | | a | | Trichocline Cass. | | Asteraceae |
| Trichocoronis A. Gray | | a | | Trichocoronis A. Gray | | Asteraceae |
| Trichocoryne S. F. Blake | | a | | Trichocoryne S. F. Blake | | Asteraceae |
| Trichogonia (DC.) Gardner | | a | | Trichogonia (DC.) Gardner | | Asteraceae |
| Trichogoniopsis R. M. King & H. Rob. | | a | | Trichogoniopsis R. M. King & H. Rob. | | Asteraceae |
| Trichogyne Less. | Ifloga Cass. | | | Trichogyne Less. | Ifloga Cass. | Asteraceae |
| Tricholepis DC. | | a | | Tricholepis DC. | | Asteraceae |
| Trichophyllum Nutt. | Eriophyllum Lag. | | | Trichophyllum Nutt. | Eriophyllum Lag. | Asteraceae |
| Trichoptilium A. Gray | | a | | Trichoptilium A. Gray | | Asteraceae |
| Trichospira Kunth | | a | | Trichospira Kunth | | Asteraceae |
| Trilisa (Cass.) Cass. | | a | | Trilisa (Cass.) Cass. | | Asteraceae |
| Trimorpha Cass. | Erigeron L. | | | Trimorpha Cass. | Erigeron L. | Asteraceae |
| Triniteurybia Brouillet et al. | | a | | Triniteurybia Brouillet et al. | | Asteraceae |
| Trioncinia (F. Muell.) Veldkamp | | a | | Trioncinia (F. Muell.) Veldkamp | | Asteraceae |
| Tripleurospermum Sch. Bip. | | a | | Tripleurospermum Sch. Bip. | | Asteraceae |
| Triplocephalum O. Hoffm. | | a | | Triplocephalum O. Hoffm. | | Asteraceae |
| Triplotaxis Hutch. | Cyanthillium Blume | | | Triplotaxis Hutch. | Cyanthillium Blume | Asteraceae |
| Tripolium Nees | | a | | Tripolium Nees | | Asteraceae |
| Tripteris Less. | | a | | Tripteris Less. | | Asteraceae |
| Triptilion Ruiz & Pav. | | a | | Triptilion Ruiz & Pav. | | Asteraceae |
| Triptilodiscus Turcz. | | a | | Triptilodiscus Turcz. | | Asteraceae |
| Trixis P. Browne | | a | | Trixis P. Browne | | Asteraceae |
| Troglophyton Hilliard & B. L. Burtt | | a | | Troglophyton Hilliard & B. L. Burtt | | Asteraceae |
| Trommsdorffia Bernh. | Hypochaeris L. | | | Trommsdorffia Bernh. | Hypochaeris L. | Asteraceae |
| Troximon Gaertn. | Krigia Schreb. | | | Troximon Gaertn. | Krigia Schreb. | Asteraceae |
| Trychinolepis B. L. Rob. | Ophryosporus Meyen | | | Trychinolepis B. L. Rob. | Ophryosporus Meyen | Asteraceae |
| Tuberculocarpus Pruski | | a | | Tuberculocarpus Pruski | | Asteraceae |
| Tuberostyles Benth., orth. var. | Tuberostylis Steetz | | | Tuberostyles Benth., orth. var. | Tuberostylis Steetz | Asteraceae |
| Tuberostylis Steetz | | a | | Tuberostylis Steetz | | Asteraceae |
| Tuckermannia Nutt. | Coreopsis L. | | | Tuckermannia Nutt. | Coreopsis L. | Asteraceae |
| Tugarinovia Iljin | | a | | Tugarinovia Iljin | | Asteraceae |
| Turanecio Hamzaoğlu | | a | | Turanecio Hamzaoğlu | | Asteraceae |
| Turaniphytum Poljakov | | a | | Turaniphytum Poljakov | | Asteraceae |
| Tussilago L. | | a | | Tussilago L. | | Asteraceae |
| Tuxtla Villaseñor & Strother | | a | | Tuxtla Villaseñor & Strother | | Asteraceae |
| Tyleropappus Greenm. | | a | | Tyleropappus Greenm. | | Asteraceae |
| Tyrimnus (Cass.) Cass. | | a | | Tyrimnus (Cass.) Cass. | | Asteraceae |
| Uechtritzia Freyn | | a | | Uechtritzia Freyn | | Asteraceae |
| Ugamia Pavlov | | a | | Ugamia Pavlov | | Asteraceae |
| Uhdea Kunth | Montanoa Cerv. | | | Uhdea Kunth | Montanoa Cerv. | Asteraceae |
| Uleophytum Hieron. | | a | | Uleophytum Hieron. | | Asteraceae |
| Uniyala H. Rob. & Skvarla | | a | | Uniyala H. Rob. & Skvarla | | Asteraceae |
| Unxia L. f. | | a | | Unxia L. f. | | Asteraceae |
| Urbananthus R. M. King & H. Rob. | | a | | Urbananthus R. M. King & H. Rob. | | Asteraceae |
| Urbinella Greenm. | | a | | Urbinella Greenm. | | Asteraceae |
| Urmenetea Phil. | | a | | Urmenetea Phil. | | Asteraceae |
| Urolepis (DC.) R. M. King & H. Rob. | | a | | Urolepis (DC.) R. M. King & H. Rob. | | Asteraceae |
| Uropappus Nutt. | | a | | Uropappus Nutt. | | Asteraceae |
| Urospermum Scop. | | a | | Urospermum Scop. | | Asteraceae |
| Urostemon B. Nord. | | a | | Urostemon B. Nord. | | Asteraceae |
| Ursinia Gaertn. | | a | | Ursinia Gaertn. | | Asteraceae |
| Ursiniopsis E. Phillips | Ursinia Gaertn. | | | Ursiniopsis E. Phillips | Ursinia Gaertn. | Asteraceae |
| Vanclevea Greene | | a | | Vanclevea Greene | | Asteraceae |
| Vanillosmopsis Sch. Bip. | Eremanthus Less. | | | Vanillosmopsis Sch. Bip. | Eremanthus Less. | Asteraceae |
| Varilla A. Gray | | a | | Varilla A. Gray | | Asteraceae |
| Varthemia DC. | | a | | Varthemia DC. | | Asteraceae |
| Vellereophyton Hilliard & B. L. Burtt | | a | | Vellereophyton Hilliard & B. L. Burtt | | Asteraceae |
| Vendredia Baill. | Senecio L. | | | Vendredia Baill. | Senecio L. | Asteraceae |
| Venegasia DC. | | a | | Venegasia DC. | | Asteraceae |
| ×Venidio-arctotis hort. | Arctotis L. | | | Venidio-arctotis hort. | Arctotis L. | Asteraceae |
| Venidium Less. | Arctotis L. | | | Venidium Less. | Arctotis L. | Asteraceae |
| Verbesina L. | | a | | Verbesina L. | | Asteraceae |
| Vernonanthura H. Rob. | | a | | Vernonanthura H. Rob. | | Asteraceae |
| Vernonella Sond. | | a | | Vernonella Sond. | | Asteraceae |
| Vernonia Schreb. | | a | | Vernonia Schreb. | | Asteraceae |
| Vernoniastrum H. Rob. | | a | | Vernoniastrum H. Rob. | | Asteraceae |
| Vernoniopsis Humbert | | a | | Vernoniopsis Humbert | | Asteraceae |
| Vesicarpa Rydb. | Sphaeromeria Nutt. | | | Vesicarpa Rydb. | Sphaeromeria Nutt. | Asteraceae |
| Veslingia Vis. | Guizotia Cass. | | | Veslingia Vis. | Guizotia Cass. | Asteraceae |
| Vicoa Cass. | Pentanema Cass. | | | Vicoa Cass. | Pentanema Cass. | Asteraceae |
| Vieraea Webb | | a | | Vieraea Webb | | Asteraceae |
| Viereckia R. M. King & H. Rob. | | a | | Viereckia R. M. King & H. Rob. | | Asteraceae |
| Vieria Webb & Berthel., nom. inval. | Vieraea Webb | | | Vieria Webb & Berthel., nom. inval. | Vieraea Webb | Asteraceae |
| Vigethia W. A. Weber | | a | | Vigethia W. A. Weber | | Asteraceae |
| Viguiera Kunth | | a | | Viguiera Kunth | | Asteraceae |
| Villanova Ortega | Parthenium L. | | | Villanova Ortega | Parthenium L. | Asteraceae |
| Villanova Lag. | | a | | Villanova Lag. | | Asteraceae |
| Villasenoria B. L. Clark | | a | | Villasenoria B. L. Clark | | Asteraceae |
| Vilobia Strother | Tagetes L. | | | Vilobia Strother | Tagetes L. | Asteraceae |
| Virginea (DC.) Nicoli | Helichrysum Mill. | | | Virginea (DC.) Nicoli | Helichrysum Mill. | Asteraceae |
| Virgulaster Semple | Aster L. | | | Virgulaster Semple | Aster L. | Asteraceae |
| Vittadinia A. Rich. | | a | | Vittadinia A. Rich. | | Asteraceae |
| Vittetia R. M. King & H. Rob. | | a | | Vittetia R. M. King & H. Rob. | | Asteraceae |
| Vladimiria Iljin | Dolomiaea DC. | | | Vladimiria Iljin | Dolomiaea DC. | Asteraceae |
| Volkensia O. Hoffm. | Bothriocline Oliv. ex Benth. | | | Volkensia O. Hoffm. | Bothriocline Oliv. ex Benth. | Asteraceae |
| Volutaria Cass. | | a | | Volutaria Cass. | | Asteraceae |
| Wagenitzia Dostál | Centaurea L. | | | Wagenitzia Dostál | Centaurea L. | Asteraceae |
| Waitzia J. C. Wendl. | | a | | Waitzia J. C. Wendl. | | Asteraceae |
| Waldheimia Kar. & Kir. | Allardia Decne. | | | Waldheimia Kar. & Kir. | Allardia Decne. | Asteraceae |
| Wamalchitamia Strother | | a | | Wamalchitamia Strother | | Asteraceae |
| Wardaster Small | Aster L. | | | Wardaster Small | Aster L. | Asteraceae |
| Warionia Benth. & Coss. | | a | | Warionia Benth. & Coss. | | Asteraceae |
| Webbia DC. | Vernonia Schreb. | | | Webbia DC. | Vernonia Schreb. | Asteraceae |
| Weberaster Á. Löve & D. Löve | Aster L. | | | Weberaster Á. Löve & D. Löve | Aster L. | Asteraceae |
| Wedelia Jacq. | | a | | Wedelia Jacq. | | Asteraceae |
| Welwitschiella O. Hoffm. | | a | | Welwitschiella O. Hoffm. | | Asteraceae |
| Wendelboa Soest | | a | | Wendelboa Soest | | Asteraceae |
| Werneria Kunth | | a | | Werneria Kunth | | Asteraceae |
| Westoniella Cuatrec. | | a | | Westoniella Cuatrec. | | Asteraceae |
| Wettsteinia Petr. | Carduus L. | | | Wettsteinia Petr. | Carduus L. | Asteraceae |
| Whitneya A. Gray | Arnica L. | | | Whitneya A. Gray | Arnica L. | Asteraceae |
| Wiestia Sch. Bip. | Lactuca L. | | | Wiestia Sch. Bip. | Lactuca L. | Asteraceae |
| Wilkesia A. Gray | | a | | Wilkesia A. Gray | | Asteraceae |
| Willemetia Neck. | | a | | Willemetia Neck. | | Asteraceae |
| Willoughbya Neck. ex Kuntze | Mikania Willd. | | | Willoughbya Neck. ex Kuntze | Mikania Willd. | Asteraceae |
| Wollastonia DC. ex Decne. | Melanthera Rohr | | | Wollastonia DC. ex Decne. | Melanthera Rohr | Asteraceae |
| Wootonella Standl. | Verbesina L. | | | Wootonella Standl. | Verbesina L. | Asteraceae |
| Wootonia Greene | Dicranocarpus A. Gray | | | Wootonia Greene | Dicranocarpus A. Gray | Asteraceae |
| Wulffia Neck. ex Cass. | | a | | Wulffia Neck. ex Cass. | | Asteraceae |
| Wunderlichia Riedel ex Benth. & Hook. f. | | a | | Wunderlichia Riedel ex Benth. & Hook. f. | | Asteraceae |
| Wyethia Nutt. | | a | | Wyethia Nutt. | | Asteraceae |
| Xanthidium Delpino | Ambrosia L. | | | Xanthidium Delpino | Ambrosia L. | Asteraceae |
| Xanthisma DC. | | a | | Xanthisma DC. | | Asteraceae |
| Xanthium L. | | a | | Xanthium L. | | Asteraceae |
| Xanthocephalum Willd. | | a | | Xanthocephalum Willd. | | Asteraceae |
| Xanthochrysum Turcz. | Schoenia Steetz | | | Xanthochrysum Turcz. | Schoenia Steetz | Asteraceae |
| Xanthopappus C. Winkl. | | a | | Xanthopappus C. Winkl. | | Asteraceae |
| Xanthophthalmum Sch. Bip., orth. var. | Glebionis Cass. | | | Xanthophthalmum Sch. Bip., orth. var. | Glebionis Cass. | Asteraceae |
| Xantophtalmum Sch. Bip. | Glebionis Cass. | | | Xantophtalmum Sch. Bip. | Glebionis Cass. | Asteraceae |
| Xenophontia Vell. | Barnadesia Mutis ex L. f. | | | Xenophontia Vell. | Barnadesia Mutis ex L. f. | Asteraceae |
| Xenophyllum V. A. Funk | | a | | Xenophyllum V. A. Funk | | Asteraceae |
| Xeranthemum L. | | a | | Xeranthemum L. | | Asteraceae |
| Xerochrysum Tzvelev | | a | | Xerochrysum Tzvelev | | Asteraceae |
| Xerolekia Anderb. | | a | | Xerolekia Anderb. | | Asteraceae |
| Xerxes J. R. Grant | | a | | Xerxes J. R. Grant | | Asteraceae |
| Ximenesia Cav. | Verbesina L. | | | Ximenesia Cav. | Verbesina L. | Asteraceae |
| Xiphochaeta Poepp. | | a | | Xiphochaeta Poepp. | | Asteraceae |
| Xylanthemum Tzvelev | | a | | Xylanthemum Tzvelev | | Asteraceae |
| Xylorhiza Nutt. | | a | | Xylorhiza Nutt. | | Asteraceae |
| Xylothamia G. L. Nesom et al. | Gundlachia A. Gray | | | Xylothamia G. L. Nesom et al. | Gundlachia A. Gray | Asteraceae |
| Xylovirgata Urbatsch & R. P. Roberts | | a | | Xylovirgata Urbatsch & R. P. Roberts | | Asteraceae |
| Xyridopsis Welw. ex B. Nord. | Psednotrichia Hiern | | | Xyridopsis Welw. ex B. Nord. | Psednotrichia Hiern | Asteraceae |
| Yermo Dorn | | a | | Yermo Dorn | | Asteraceae |
| Youngia Cass. | | a | | Youngia Cass. | | Asteraceae |
| Yunquea Skottsb. | Centaurodendron Johow | | | Yunquea Skottsb. | Centaurodendron Johow | Asteraceae |
| Zacintha Mill. | Crepis L. | | | Zacintha Mill. | Crepis L. | Asteraceae |
| Zaluzania Pers. | | a | | Zaluzania Pers. | | Asteraceae |
| Zandera D. L. Schulz | | a | | Zandera D. L. Schulz | | Asteraceae |
| Zemisia B. Nord. | | a | | Zemisia B. Nord. | | Asteraceae |
| Zexmenia La Llave | | a | | Zexmenia La Llave | | Asteraceae |
| Zinnia L. | | a | | Zinnia L. | | Asteraceae |
| Zoegea L. | | a | | Zoegea L. | | Asteraceae |
| Zonanthemis Greene | Hemizonia DC. | | | Zonanthemis Greene | Hemizonia DC. | Asteraceae |
| Zyrphelis Cass. | | a | | Zyrphelis Cass. | | Asteraceae |
| Zyzyxia Strother | | a | | Zyzyxia Strother | | Asteraceae |