Rhododendron subgenus Hymenanthes
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Rhododendron subgenus 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:
- Rhododendron subsect. Arborea (three species)
- Rhododendron subsect. Argyrophylla (six species)
- Rhododendron subsect. Auriculata (one species, R. auriculatum)
- Rhododendron subsect. Barbata (two species)
- Rhododendron subsect. Campanulata (two species)
- Rhododendron subsect. Campylocarpa (four species)
- Rhododendron subsect. Falconera (seven species)
- Rhododendron subsect. Fortunea (ten species)
- Rhododendron subsect. Fulgensia (two species)
- Rhododendron subsect. Fulva (two species)
- Rhododendron subsect. Glischra (five species)
- Rhododendron subsect. Grandia (nine species)
- Rhododendron subsect. Griersoniana (one species, R. griersonianum)
- Rhododendron subsect. Irrorata (seven species)
- Rhododendron subsect. Lanata (one species, R. lanatum)
- Rhododendron subsect. Maculifera (six species)
- Rhododendron subsect. Neriiflora (19 species)
- Rhododendron subsect. Parishia (three species)
- Rhododendron subsect. Pontica (13 species)
- Rhododendron subsect. Selensia (five species)
- Rhododendron subsect. Taliensia (20 species)
- Rhododendron subsect. Thomsonia (seven species)
- Rhododendron subsect. Venatora (one species, R. venator)
- Rhododendron subsect. Williamsiana (one species, R. williamsianum)
[edit] 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.
[edit] References
- Germplasm Resources Information Network: Rhododendron subgenus Hymenanthes
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan.
