纯黄杜鹃 chun huang du juan

Shrubs, evergreen, usually epiphytic, 0.2–1.7 m tall; branchlets scaly, setose. Petiole 6–16 mm, setose; leaf blade leathery, broadly elliptic or obovate to oblong-elliptic, 4–9 × 2–5 cm; base rounded or obtuse; apex obtuse or rounded, mucronate; abaxial surface pale, glaucous, scales 1–2 × their own diameter apart, unequal, golden yellow to brown, slightly sunk in pits; adaxial surface green, shiny, usually sparsely scaly. Inflorescence 3–6-flowered. Pedicel 0.7–1(–2) cm, densely scaly; calyx saucerlike, reduced to an undulate rim; lobes 1–2 mm, broadly ovate, persisting to enclose mature capsule, scaly, margin setose; corolla broadly campanulate or rotate-campanulate, bright yellow, 1.5–3(–4) cm, tube ca. 15 mm, outer surface scaly, pubescent at base, inner surface pilose; stamens 10, filaments pubescent towards base or for 1/3–2/3 of their length; ovary densely scaly; style stout, sharply bent, short, scaly at base. Capsule cylindric or cylindric-ovoid, 10–12 mm, scaly. Fl. Apr–May, fr. Jun–Aug.

Mixed forests, rocks, sometimes epiphytic; 2000–2800 m. SE Xizang, NW Yunnan [NE Myanmar].