翅柄杜鹃 chi bing du juan

Shrubs, 0.6–1.2 m tall; young shoots sparsely scaly, hispid. Petiole flat, narrowly winged, 4–6 mm, sparsely scaly, hispid; leaf blade oblong-lanceolate or oblong-obovate, 2.5–5 × 1.2–2.6 cm; base obtuse or cuneate decurrent; apex acute or obtuse, apiculate; abaxial surface scales 3–6 × their own diameter apart, small, pale brown, glabrous on both surfaces; adaxial surface sometimes sparsely scaly; midrib and lateral veins raised abaxially, concave adaxially; lateral veins inconspicuous on both surfaces; veins conspicuously concave adaxially. Inflorescence terminal, cymose, 2–4(–5)-flowered; bractlets linear-spathulate. Pedicel 0.6–1.2 cm, sparsely scaly, densely hispid; calyx green, deeply 5-lobed; lobes 8–12 mm, ovate-lanceolate, scaly at base, persistent in fruit; corolla broadly funnelform, yellow, 3–4.6 cm, nearly glabrous; stamens 10, unequal, long ones as long as corolla, filaments densely pubescent at base; ovary 5-locular, densely scaly and pubescent, at least above; style longer than corolla, glabrous. Capsule 6–9 × 5–7 mm, scaly, hispid. Fl. May–Jun.

Forests in high mountains, slopes, cliffs; ca. 3400 m. SE Xizang, NW Yunnan.