《中国植物志》|| 杜鹃花科 ERICACEAE ||高山杜鹃亚组 Subsect. Lapponica (Balf. f.) Sleumer ||刚毛杜鹃 Rhododendron setosum D. Don

85．刚毛杜鹃（中国高等植物图鉴）图版25：1-5
Rhododendron setosum D. Don in Mem. Wern. Soc. 3: 409. 1821; Hutch. in Stevenson, Spec. Rhodod. 428. 1930; Hara, Fl. East. Himal. 240. 1966; 中国高等植物图鉴3: 51. 图4055. 1974; Cullen in Not. Bot. Gard. Edinb. 39: 109. 1980; Davidian, Rhodod. Spec. 1: 207. 1982; 西藏植物志3: 671. 图268. 1986.
常绿小灌木，直立，高10-30（-120）厘米，分枝细长，斜展。幼枝被开展的脱落性刚毛，并密被微柔毛和鳞片；叶芽鳞脱落，叶革质，卵形，椭圆形、长圆形至倒卵形，长7-12（-15）毫米，宽4-6（-8）毫米，顶端圆或钝，有短突尖头，基部近圆形，叶边缘反卷，密生刚毛，上面暗绿色或灰绿色，无光泽，密被不邻接的鳞片，下面苍绿色，密被刚毛，鳞片二色，金黄色和深黄褐色鳞片约相等混生，其间距为其直径的1-4倍；叶柄长1-3毫米，被刚毛和鳞片。花序顶生，伞形，具1-3（-8）花，花芽鳞脱落；花梗长3-5（-10）毫米，紫红色，被鳞片和微柔毛，有时被红色刚毛；花萼发达，紫红色，深裂至基部，裂片长圆形、椭圆形或卵形，长4-7（-8）毫米，疏生鳞片，有时边缘被长睫毛；花冠宽漏斗状，长（10-）12-16（-18）厘米，紫红色，花管较裂片稍短，长7-8毫米，内面被短柔毛，裂片开展，无毛及鳞片；雄蕊8-10，花丝近基部密被柔毛；子房长约2毫米，5室，密被鳞片，花柱较雄蕊长，无毛和鳞片。蒴果长约5-6毫米，长圆状卵形，密被鳞片，为宿存萼包被。花期4-5月，果期7-9月。
产西藏东南及南部。生于高山草坡、草甸、山坡灌丛、灌丛草地及杜鹃灌丛中，海拔3 500-4 800米。尼泊尔、锡金、不丹、印度大吉岭也有分布。

《Flora of China》|| Apiaceae || Rhododendron ||刚毛杜鹃 Rhododendron setosum

88. Rhododendron setosum D. Don, Mem. Wern. Nat. Hist. Soc. 3: 408. 1821.

刚毛杜鹃 gang mao du juan

Erect shrubs, 0.1–0.3(–1.2) m tall, usually intricately branched; young shoots densely scaly with flaky scales, densely setose. Petiole 1–3 mm, scaly, setose; leaf blade ovate, elliptic, oblong to obovate, 0.7–1.2(–1.5) × 0.4–0.6(–0.8) cm; base rounded; margin ciliate; apex usually rounded, mucronate; abaxial surface pale gray-green, densely setose, scales not contiguous, dimorphic, usually golden and dark brown, nearly equal in number and intermixed; adaxial surface usually dark green, densely scaly. Inflorescence 1–3(–8)-flowered. Pedicel 0.3–0.5(–1) cm, scaly, sometimes setose; calyx rose-purple; lobes 4–7(–8) mm, oblong, elliptic or ovate, persistent in fruit, scaly, margin usually ciliate; corolla broadly funnelform, purple-pink, (1–)1.2–1.6(–1.8) cm, tube 7–8 mm, outer surface glabrous, inner surface pubescent; stamens 8–10, exserted from corolla, filaments pubescent towards base; ovary ca. 2 mm, scaly; style longer than stamens, glabrous. Capsule cylindric-ovoid, 5–6 mm, densely scaly. Fl. Apr–May, fr. Jul–Sep.

Rhododendron thickets, open scrub, alpine meadows; 3500–4800 m. S Xizang [Bhutan, India (W Bengal), Nepal, Sikkim].