Rhododendron subg. Hymenanthes
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| Rhododendron subgenus Hymenanthes | |
|---|---|
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| Rhododendron ponticum | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Ericales |
| Family: | Ericaceae |
| Genus: | Rhododendron |
| Subgenus: | Hymenanthes (Blume) K.Koch |
| Section: | Ponticum |
Rhododendron subg. Hymenanthes is a subgenus of the genus Rhododendron, with a widespread distribution in the temperate Northern Hemisphere. The species are evergreen shrubs and small to medium-sized trees (up to 20 m tall), with medium-sized to large leaves (very large, over 40 cm long, in a few species). The flowers are large, produced in terminal trusses of 5-40 together.
The subgenus includes one section, Rhododendron sect. Ponticum, divided into 24 subsections and about 140 species:
- R. subsect. Arborea (three species)
- R. subsect. Argyrophylla (six species)
- R. subsect. Auriculata (one species, R. auriculatum)
- R. subsect. Barbata (two species)
- R. subsect. Campanulata (two species)
- R. subsect. Campylocarpa (four species)
- R. subsect. Falconera (seven species)
- R. subsect. Fortunea (ten species)
- R. subsect. Fulgensia (two species)
- R. subsect. Fulva (two species)
- R. subsect. Glischra (five species)
- R. subsect. Grandia (nine species)
- R. subsect. Griersoniana (one species, R. griersonianum)
- R. subsect. Irrorata (seven species)
- R. subsect. Lanata (one species, R. lanatum)
- R. subsect. Maculifera (six species)
- R. subsect. Neriiflora (19 species)
- R. subsect. Parishia (three species)
- R. subsect. Pontica (13 species)
- R. subsect. Selensia (five species)
- R. subsect. Taliensia (20 species)
- R. subsect. Thomsonia (seven species)
- R. subsect. Venatora (one species, R. venator)
- R. subsect. Williamsiana (one species, R. williamsianum)
Cultivation
This subgenus includes the majority of the larger evergreen rhododendrons widely grown as ornamental plants. Some species, notably Rhododendron ponticum, have escaped from cultivation and become invasive in some regions such as New Zealand.
References
- Germplasm Resources Information Network: Rhododendron subgenus Hymenanthes
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan.
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