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22. Rhododendron subsect. Fulgensia D. F. Chamberlain, Notes Roy. Bot. Gard. Edinburgh. 37: 336. 1979.

猩红杜鹃亚组 xing hong du juan ya zu

Hu Linzhen (胡琳贞 Hu Ling-cheng); David F. Chamberlain

Shrubs or small trees; young shoots tomentose, glandular or glabrous. Leaf blade oblong-elliptic to obovate; abaxial surface densely fulvous woolly, hairs fasciculate or long-stipitate stellate. Inflorescence terminal, lax or dense, 4–14-flowered; rachis 0.2–2.5 cm. Calyx minute to well-developed and cup-shaped, 1–10 mm, 5-lobed; corolla funnel- to tubular-campanulate, 5-lobed, fleshy, blood-red, or scarlet to deep carmine, with nectar pouches; stamens 10; ovary and style glabrous. Capsule straight or slightly curved.

Three species: Bhutan, China, India, Nepal, Sikkim; three species (two endemic) in China.

The circumscription of Rhododendron subsect. Fulgensia is problematic. Whereas R. fulgens is perfectly distinct, both R. miniatum and R. sherriffii are closely allied to species in R. subsect. Thomsonia, though with leaves abaxially densely hairy.

1 Young shoots glabrous; inflorescence 8–14-flowered; corolla tubular-campanulate, blood-red to scarlet, 2–3.5 cm; calyx 1–2 mm.   444 Rhododendron fulgens
+ Young shoots ± hairy; inflorescence 4–6-flowered; corolla funnelform-campanulate, deep carmine; calyx 3–10 mm.   (2)
2 (1) Young shoots glandular; abaxial leaf surface with long-stipitate stellate hairs; calyx 3–5 mm; corolla 3.5–4 cm.   445 Rhododendron sherriffii
+ Young shoots eglandular; abaxial leaf surface with fasciculate hairs; calyx 8–10 mm; corolla 3–3.5 cm.   446 Rhododendron miniatum

Lower Taxa


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