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

71. Rhododendron heliolepis Franchet, Bull. Soc. Bot. France. 34: 283. 1887.

亮鳞杜鹃 liang lin du juan

Rhododendron heliolepis

Credit: Harvard University Herbaria

Shrubs or sometimes small trees, evergreen, (1–)2–5(–6) m tall; young shoots stout, densely scaly. Petiole 5–15 mm; leaf blade with a strong oily fragrance, elliptic or elliptic-lanceolate, 5–12 × 1.7–4 cm; base narrow or sometimes rounded; apex acute or acuminate, apiculate; abaxial surface pale green, pale yellowish green or brown, scales 0.5–2 × their own diameter apart, sometimes contiguous, large, all ± similar, thin, flat or concave in center, pale yellowish green or gray-white; adaxial surface deep green or brown, scales dense when young, quickly deciduous. Inflorescence terminal, umbellate, 5–7(–10)-flowered. Pedicel thin, 1–3 cm, densely scaly; calyx undulate; lobes ca. 2 mm, sometimes oblong, densely scaly; corolla campanulate, pink, pale purplish red or rarely white, with purple or brown spots inside, 2.5–3.5 cm, outer surface sparsely or densely scaly sometimes also pubescent; stamens 10, unequal, shorter than corolla; filaments hispid below; ovary 5(or 6)-locular, densely scaly; style shorter than or as long as, rarely longer than stamens, glabrous or pubescent below. Capsule cylindric, 10–13 mm. Fl. Jul–Aug, fr. Aug–Nov.

Coniferous-broad-leaved mixed forests, Abies forest margins, Rhododendron thickets, thickets on slopes, wet valleys; 3000–3700(–4000) m. Sichuan, Xizang, Yunnan [Myanmar].


1 Corolla pubescent on outer surface.   71b var. oporinum
+ Corolla without hairs on outer surface.   (2)
       
2 (1) Style glabrous; corolla purplish red, with reddish brown spots inside.   71a var. heliolepis
+ Style pubescent below; corolla pink, pale purplish red or rarely white, with purplish spots inside.   71c var. fumidum

Lower Taxa


 

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    Photos by The Biodiversity of the Hengduan Mountains Project  
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