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

90. Rhododendron rupicola W. W. Smith, Notes Roy. Bot. Gard. Edinburgh. 8: 203. 1914.

多色杜鹃 duo se du juan

Small shrubs, 0.6–(1.2) m tall, much-branched, scaly. Petiole 1–3(–4.5) mm, scaly; leaf blade broadly elliptic, oblong or ovate, 0.65–2.1 × 0.3–1.3 cm; base broadly cuneate to truncate; apex rounded, mucronate; abaxial surface yellowish brown, scales overlapping to slightly spaced, 2-colored, dark brown or amber and pale golden, the darker scales usually predominating; adaxial surface densely scaly. Inflorescence 2–6(–8)-flowered. Pedicel 0.2–0.4 cm, scaly; calyx reddish purple; lobes (2.4–)4–5(–6) mm, oblong or broadly ovate, persistent in fruit, scales forming a broad central band, margin with or without scales, sometimes ciliate; corolla broadly funnelform, purple to crimson, or yellow, rarely white, (0.8–)1–1.6(–1.8) cm, tube 3–6(–8) mm, outer surface scaly, sometimes pubescent, throat pubescent; stamens 5–10, number variable even within one inflorescence, filaments pubescent towards base; ovary 2–3 mm, scaly, pubescent; style 1–1.9 cm, longer than stamens, pubescent or glabrous. Capsule broadly ovoid, 4–6 mm, scaly, pubescent. Fl. May–Jul, fr. Jul–Sep.

Pinus forests, forest margins, Rhododendron thickets, alpine meadows, open stony grasslands, open moorlands, rocky or stony slopes; 2800–4800(–4900) m. W Sichuan, SE Xizang, C and N Yunnan [NE Myanmar].


1 Corolla purple to crimson, rarely white.   90a var. rupicola
+ Corolla yellow.   (2)
       
2 (1) Calyx lobes fringed only with cilia.   90b var. chryseum
+ Calyx lobes fringed with scales and cilia.   90c var. muliense

Lower Taxa


 

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Photos by The Biodiversity of the Hengduan Mountains Project  
  • Image/JPEG (David E. Boufford)
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