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FOC | Family List | FOC Vol. 14 | Ericaceae

10. Rhododendron subsect. Uniflora Sleumer, Bot. Jahrb. Syst. 74: 532. 1949.

单花杜鹃亚组 dan hua du juan ya zu

Yang Hanbi (杨汉碧 Yang Han-pi); David C. Chamberlain

Dwarf shrubs, often prostrate and mat forming, to 0.5(–1) m tall. Leaves small; leaf blade margin revolute, crenate; abaxial surface scales not overlapping, golden or brown, often darkening with age; adaxial surface usually scaly. Inflorescence terminal, 1–3-flowered. Pedicel rigid, accrescent in fruit; calyx 1–7 mm, deeply 5-lobed, scaly, ciliate on margin; corolla broadly funnelform-campanulate or tubular-funnelform, purple to pinkish purple, pink, purplish mauve or yellow with spots within tube, outer surface mostly densely pubescent and sparsely scaly; stamens 10, shorter than corolla; ovary 5-locular; style straight, mostly glabrous, sometimes sparsely scaly at base. Capsule rounded or ovoid, to cylindric, 4–13 mm. Seeds wingless, obscurely finned.

About four species: Bhutan, China, India, Myanmar, Nepal, Sikkim; four species in China.

1 Calyx 5–7 mm; corolla yellow; leaf blade crenate.   118 Rhododendron ludlowii
+ Calyx 1–3 mm; corolla pink, rose or purple; leaf blade entire.   (2)
2 (1) Corolla campanulate, 8–21 mm; style shorter than stamens; leaf blade elliptic to obovate-elliptic.   119 Rhododendron pumilum
+ Corolla funnelform, 20–32 mm; style longer than stamens; leaf blade lanceolate, oblanceolate or oblong-obovate.   (3)
3 (2) Abaxial leaf surface sparsely scaly, the scales 3–6 × their own diameter apart.   120 Rhododendron uniflorum
+ Abaxial leaf surface densely scaly, the scales 0.5–1.5 × their own diameter apart.   121 Rhododendron pemakoense

Lower Taxa


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