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FOC | Family List | FOC Vol. 14 | Apiaceae | Rhododendron

4. Rhododendron maddenii J. D. Hooker, Rhododendr. Sikkim-Himalaya. 2: t. 18. 1851 [“maddeni”].

隐脉杜鹃 yin mai du juan

Shrubs or small trees, 3–6 m tall; branches many; young shoots brownish scaly. Petiole grooved, 5–10 mm; leaf blade leathery, lanceolate, oblong-oblanceolate, or elliptic, 5–15(–18) × 2–8 cm; base cuneate; apex acute or obtuse; abaxial surface scales dense, reddish brown; adaxial surface scales present in young leaves, glabrescent. Inflorescence 3–5-flowered. Flowers fragrant. Pedicel 1.3–1.5 cm; calyx lobes 3–5 mm, orbicular or oblong, scaly; corolla funnelform, white, (3.5–)6–8.5(–10) cm; tube (20–)30–50(–60) mm; outer surface scaly; stamens 15–25, filaments glabrous or pubescent; ovary 10–12-locular; style exserted, upper 1/3 with scales; stigma large, discoid. Capsule ovoid or ellipsoid, 10–35 × 10–15 mm. Fr. Aug.

Forests, Tsuga-Rhododendron thickets, scrub, river valleys; (1500–)2600–3200 m. S Xizang, N and W Yunnan [Bhutan, N India, NE Myanmar, Sikkim, Thailand, N Vietnam].


1 Leaf blade 2–4 cm wide; filaments usually glabrous; capsule ovoid, 1–2 cm.   4a subsp. maddenii
+ Leaf blade (4–)5.5–8 cm wide; filaments often pubescent; capsule ellipsoid, 2–3.5 cm.   4b subsp. crassum

Lower Taxa


 

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