| 18807 | Helictotrichon asperum (Munro ex Thwaites) Bor | Helictotrichon virescens (Nees) Henrard | 316444 | | | Helictotrichon asperum (Munro ex Thwaites) Bor | Helictotrichon virescens (Nees) Henrard |
| 18808 | Helictotrichon hookeri (Scribn.) Henrard | Helictochloa hookeri (Scribn.) Romero Zarco subsp. hookeri | 463632 | | | Helictotrichon hookeri (Scribn.) Henrard | Helictochloa hookeri (Scribn.) Romero Zarco subsp. hookeri |
| 18809 | Helictotrichon planiculme (Schrad.) Pilg. | Helictochloa planiculmis (Schrad.) Romero Zarco | 463636 | | | Helictotrichon planiculme (Schrad.) Pilg. | Helictochloa planiculmis (Schrad.) Romero Zarco |
| 18810 | Helictotrichon pratense (L.) Besser | Helictochloa pratensis (L.) Romero Zarco | 463637 | | | Helictotrichon pratense (L.) Besser | Helictochloa pratensis (L.) Romero Zarco |
| 18811 | Helictotrichon pubescens (Huds.) Pilg. | Avenula pubescens (Huds.) Dumort. | 103467 | | | Helictotrichon pubescens (Huds.) Pilg. | Avenula pubescens (Huds.) Dumort. |
| 18812 | Helictotrichon sempervirens (Vill.) Pilg. | | | a | | Helictotrichon sempervirens (Vill.) Pilg. | |
| 18813 | Helictotrichon sulcatum (Boiss.) Henrard | Helictochloa marginata (Lowe) Romero Zarco | 463634 | | | Helictotrichon sulcatum (Boiss.) Henrard | Helictochloa marginata (Lowe) Romero Zarco |
| 18814 | Helictotrichon turgidulum (Stapf) Schweick. | Trisetopsis turgidula (Stapf) Röser & A. Wölk | 467692 | | | Helictotrichon turgidulum (Stapf) Schweick. | Trisetopsis turgidula (Stapf) Röser & A. Wölk |
| 103495 | Helictotrichon decorum (Janka) Henrard | | | a | | Helictotrichon decorum (Janka) Henrard | |
| 103496 | Helictotrichon desertorum (Less.) Nevski | | | a | | Helictotrichon desertorum (Less.) Nevski | |
| 103497 | Helictotrichon sedenense (Clarion ex DC.) Holub | | | a | | Helictotrichon sedenense (Clarion ex DC.) Holub | |
| 300261 | Helictotrichon spp. | | | a | | Helictotrichon spp. | |
| 316440 | Helictotrichon bromoides (Gouan) C. E. Hubb. | Helictochloa bromoides (Gouan) Romero Zarco | 463629 | | | Helictotrichon bromoides (Gouan) C. E. Hubb. | Helictochloa bromoides (Gouan) Romero Zarco |
| 316441 | Helictotrichon compressum (Heuff.) Henrard | Helictochloa compressa (Heuff.) Romero Zarco | 463630 | | | Helictotrichon compressum (Heuff.) Henrard | Helictochloa compressa (Heuff.) Romero Zarco |
| 316442 | Helictotrichon versicolor (Vill.) Pilg. | Helictochloa versicolor (Vill.) Romero Zarco subsp. versicolor | 463639 | | | Helictotrichon versicolor (Vill.) Pilg. | Helictochloa versicolor (Vill.) Romero Zarco subsp. versicolor |
| 316443 | Helictotrichon schellianum (Hack.) Kitag. | Helictochloa hookeri (Scribn.) Romero Zarco subsp. schelliana (Hack.) Romero Zarco | 463633 | | | Helictotrichon schellianum (Hack.) Kitag. | Helictochloa hookeri (Scribn.) Romero Zarco subsp. schelliana (Hack.) Romero Zarco |
| 316444 | Helictotrichon virescens (Nees) Henrard | | | a | | Helictotrichon virescens (Nees) Henrard | |
| 319096 | Helictotrichon tibeticum (Roshev.) Holub | | | a | | Helictotrichon tibeticum (Roshev.) Holub | |
| 401963 | Helictotrichon mongolicum (Roshev.) Henrard | | | a | | Helictotrichon mongolicum (Roshev.) Henrard | |
| 410701 | Helictotrichon montanum (Vill.) Henrard | Helictotrichon sedenense (Clarion ex DC.) Holub | 103497 | | | Helictotrichon montanum (Vill.) Henrard | Helictotrichon sedenense (Clarion ex DC.) Holub |
| 418760 | Helictotrichon altius (Hitchc.) Ohwi | | | a | | Helictotrichon altius (Hitchc.) Ohwi | |
| 452412 | Helictotrichon tianschanicum (Roshev.) Henrard | | | a | | Helictotrichon tianschanicum (Roshev.) Henrard | |
| 453511 | Helictotrichon canescens (Buckley) Clayton | Trisetum cernuum Trin. subsp. canescens (Buckley) Calder & Roy L. Taylor | 451650 | | | Helictotrichon canescens (Buckley) Clayton | Trisetum cernuum Trin. subsp. canescens (Buckley) Calder & Roy L. Taylor |
| 463557 | Helictotrichon hookeri (Scribn.) Henrard subsp. schellianum (Hack.) Tzvelev | Helictochloa hookeri (Scribn.) Romero Zarco subsp. schelliana (Hack.) Romero Zarco | 463633 | | i | Helictotrichon hookeri (Scribn.) Henrard subsp. schellianum (Hack.) Tzvelev | Helictochloa hookeri (Scribn.) Romero Zarco subsp. schelliana (Hack.) Romero Zarco |
| 463562 | Helictotrichon versicolor (Vill.) M. Laínz unranked caucasica Holub | Helictochloa versicolor (Vill.) Romero Zarco subsp. caucasica (Holub) Romero Zarco | 463640 | | i | Helictotrichon versicolor (Vill.) M. Laínz unranked caucasica Holub | Helictochloa versicolor (Vill.) Romero Zarco subsp. caucasica (Holub) Romero Zarco |
| 463564 | Helictotrichon adzharicum (Albov) Grossh. | Helictochloa versicolor (Vill.) Romero Zarco subsp. caucasica (Holub) Romero Zarco | 463640 | | | Helictotrichon adzharicum (Albov) Grossh. | Helictochloa versicolor (Vill.) Romero Zarco subsp. caucasica (Holub) Romero Zarco |
| 485569 | Helictotrichon imberbe (Nees) Veldkamp | Trisetopsis imberbis (Nees) Röser et al. | 485568 | | | Helictotrichon imberbe (Nees) Veldkamp | Trisetopsis imberbis (Nees) Röser et al. |
| 487404 | Helictotrichon hookeri (Scribn.) Henrard subsp. hookeri | Helictochloa hookeri (Scribn.) Romero Zarco subsp. hookeri | 463632 | | i | Helictotrichon hookeri (Scribn.) Henrard subsp. hookeri | Helictochloa hookeri (Scribn.) Romero Zarco subsp. hookeri |
| 490224 | Helictotrichon elongatum (Hochst. ex A. Rich.) C. E. Hubb. | | | a | | Helictotrichon elongatum (Hochst. ex A. Rich.) C. E. Hubb. | |
| 490226 | Helictotrichon lachnanthum (Hochst. ex A. Rich.) C. E. Hubb. | | | a | | Helictotrichon lachnanthum (Hochst. ex A. Rich.) C. E. Hubb. | |