Details for: 12E0100032, Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb., 'Blue Danube'

Summary Data

Taxonomy:

Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb.

Cultivar:

'Blue Danube'

Origin:

Origin – United Kingdom

Maintained:

The Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Received by CRI:

1972

Improvement Status:

Advanced/improved cultivar

Life form:

Perennial

Growth class:

flowers: perennial vegetatively propagated

Is Core:

Form Received:

Field collection

Availability

Form	Quantity	Note	Inventory	Cart
Cutting	2 cuttings		12E0100032

Note: When you select cuttings, you will receive unrooted cuttings, not rooted plants, unless specific arrangements have been made with the curator.
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Core Passport Data

Taxonomy:

Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb.

Cultivar:

'Blue Danube'

Origin:

Origin – United Kingdom

Maintained:

The Silva Tarouca Research Institute for Landscape and Ornamental Gardening

Received by CRI:

1972

Improvement Status:

Advanced/improved cultivar

Life form:

Perennial

Growth class:

flowers: perennial vegetatively propagated

Is Core:

Form Received:

Field collection

Source History

Accession Group(s)

Group name: Pěnišník, růže sadové
Note: Rhododendron, Rosa
To search for accessions in this group, click the following link. Pěnišník, růže sadové

Accession Names and Identifiers

'Blue Danube'

Type: Cultivar name

Rhododendron fortunei subsp. discolor hybr.group

Type: Full taxon

Narrative

Curator: Lenka Kašparová, The Silva Tarouca Research Institute for Landscape and Ornamental Gardening (CZE079) Lenka.Kasparova@vukoz.cz

Rhododendron fortunei Lindl. subspp. discolor (Franch.) D. F. Chamb.

Genus:

Rhododendron

Subgenus:

Hymenanthes

Section:

Ponticum

Family:

Ericaceae

Subfamily:

Ericoideae

Tribe:

Rhodoreae

Nomen number:

316269

Place of publication:

Notes Roy. Bot. Gard. Edinburgh 37:330. 1979

Verified:

October 15, 1991 by ARS Systematic Botanists.

Other conspecific taxa

Rhododendron fortunei Lindl. (1 active accession[s])
Rhododendron fortunei Lindl. subsp. fortunei (9 active accession[s])

Autonyms (not in current use), synonyms and invalid designations

Basionym
Rhododendron discolor Franch.

Heterotypic Synonym(s)
Rhododendron houlstonii Hemsl. & E. H. Wilson

Common names

Annotations

Observations

Phenotype Data

Category	Descriptor	Description	Value	Study
BIOLOGY	112 Winter frost damage - leaves	Fig. 11	1 - very low, damaged on tips or margins	2002 Research Institute of Ornamental Gardening Pruhonice
BIOLOGY	113 Winter frost damage - flower buds	113 Winter frost damage - flower buds	0 - not found, all buds opened	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	001 Plant - persistence of leaves	001 Plant - persistence of leaves	3 - evergreen	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	002 Plant - density of branches and foliage	002 Plant - density of branches and foliage	7 - compact	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	003 Plant - habit	Fig. 1	5 - rounded to spreading 1,2 – 0,6	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	009 Young leaf - waxy bloom on the upper side	Young leaves are observed as soon as they have reached full size	3 - weak	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	010 Young leaf - pubescence on the upper side	Young leaves are observed as soon as they have reached full size	0 - hairless	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	011 Young leaf - pubescence on the lower side	Young leaves are observed as soon as they have reached full size	0 - hairless	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	012 Mature leaf - blade shape	Fig. 2 / Matured leaves are observed at the time of end of growth	2 - oblong	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	013 Mature leaf - blade length	Matured leaves are observed at the time of end of growth	9 - very long > 14 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	023 Inflorescence - attitude on the shoot	Fig. 3	1 - terminal	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	024 Inflorescence - number of flowers	024 Inflorescence - number of flowers	5 - intermediate 6- 10	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	025 Inflorescence - shape (cultivars with more than 6 flowers)	Fig. 4	3 - elongate spherical	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	026 Flower - shape of flower bud	Fig. 5	3 - ovate sharpened	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	028 Flower - funnel-shaped	Fig. 6	2 - widely funnel-shaped	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	035 Flower - number of corolla lobes	035 Flower - number of corolla lobes	5 - intermediate 5 - 7	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	036 Flower - type of the flower	Fig. 8	1 - single	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	037 Flower - corolla undulation of margins	037 Flower - corolla undulation of margins	3 - weak	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	038 Flower - colour of corolla edges in comparison with flower colour	038 Flower - colour of corolla edges in comparison with flower colour	7 - darker	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	039 Flower - colour stability (comparison old and young flower)	039 Flower - colour stability (comparison old and young flower)	3 - lighter	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	063 Flower - deepness of colour on inner side	063 Flower - deepness of colour on inner side	3 - light R.H.S. - C	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	089 Flower - arrangement of supplemental colour on outer side	089 Flower - arrangement of supplemental colour on outer side	4 - midrib of lobes	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	099 The ratio pistil : stamens length	099 The ratio pistil : stamens length	6 - pistil longer	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	101 Pistil - uniformity of style colour	101 Pistil - uniformity of style colour	2 - different in lower and upper parts	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	103 Pistil - double colour of style	103 Pistil - double colour of style	2 - white, up pink	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	109 Flower - time of beginning of flowering	Comparative varieties: 2. ‘Bouzov’, 3. ‘Alena’, 4. ‘Motýl’, 5. ‘Catawbiense Grandiflorum’, 7 ‘James Burchett’. Specific values (time period) valid for central Bohemian mesophyticum (Průhonice).	5 - medium 16.5.-30.6.	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	090 Flower - presence of design	090 Flower - presence of design	1 - present	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	092 Flower - distinctness of design	092 Flower - distinctness of design	9 - very strong	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	094 Flower - type of design	Fig. 10	4 - combined	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	096 Flower - colour of design (light colours)	Type variety ‘Genoveva’. Colour observation 1 – 2 days after full bloom of the flower.	2 - yellow green	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	104 Stamens - number	104 Stamens - number	5 - intermediate constant 10	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	105 Stamens - colour of ripe anthers	105 Stamens - colour of ripe anthers	6 - purple	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	106 Stamens - colour of filaments	106 Stamens - colour of filaments	1 - unified	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	107 Stamens - colour of filaments unified	107 Stamens - colour of filaments unified	1 - white	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	004 Plant - height	In 10 years of age	9 - very high >120 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	005 Shoot - colour in the upper part	Sprouting shoot	3 - light green	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	006 Shoot - indumentum	Sprouting shoot	3 - sparse hairs	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	007 Young leaf - colour of upper side	Young leaves are observed as soon as they have reached full size	2 - light green	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	008 Young leaf - colour of lower side	Young leaves are observed as soon as they have reached full size	2 - light green	2004 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	014 Mature leaf - blade width	Matured leaves are observed at the time of end of growth	7 - broad 4,1- 6 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	015 Mature leaf - petiole length	Matured leaves are observed at the time of end of growth	5 - intermediate 1,5- 3 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	018 Mature leaf - indumentum on the lower side	Matured leaves are observed at the time of end of growth	0 - hairless	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	019 Mature leaf - colour of upper side	Matured leaves are observed at the time of end of growth	4 - dark green	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	021 Mature leaf - colour of lower side	Matured leaves are observed at the time of end of growth	3 - medium green	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	030 Flower - diameter	Maximal value at open flower	6 - intermediate to long 7,1 - 9 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	031 Flower - length of peduncle	031 Flower - length of peduncle	5 - intermediate 2,5 - 4 (cm)	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	032 Flower - presence of calyx	032 Flower - presence of calyx	0 - absent	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	040 Flower - incision of corolla margin	040 Flower - incision of corolla margin	5 - intermediate 1/3 - 1/2	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	041 Flower - inner colour of base in comparison with flower colour	041 Flower - inner colour of base in comparison with flower colour	3 - lighter	2002 Research Institute of Ornamental Gardening Pruhonice
MORPHOLOGY	042 Flower - white colour on inner side	042 Flower - white colour on inner side	1 - pale yellow green, yellowish / greenish white R.H.S. 155	2002 Research Institute of Ornamental Gardening Pruhonice
PHYSIOLOGY	122 Reproducibility - cutting	122 Reproducibility - cutting	3 - poorly rooted 10-24%	2002 Research Institute of Ornamental Gardening Pruhonice
PHYSIOLOGY	123 Reproducibility - grafting	On the rootstock ‘Cunningham´s White’	5 - intermediate affinity	2002 Research Institute of Ornamental Gardening Pruhonice
PHYSIOLOGY	124 Reproducibility - in vitro	124 Reproducibility - in vitro	7 - high	2002 Research Institute of Ornamental Gardening Pruhonice