藏南杜鹃 zang nan du juan

Small trees, 1–2.5 m tall; young shoots initially white to fawn tomentose. Petiole 10–15 mm, densely fulvous-tomentose; leaf blade leathery, oblong-elliptic to oblong-obovate, 5–7.5 × 2–3 cm; base obtuse or rounded; apex obtuse or acute and apiculate; abaxial surface indumentum 2-layered, upper layer thick, cinnamon, felted tomentose, pellicle absent, hairs branched, lower layer thin, appressed; adaxial surface slightly rugulose, glabrous. Inflorescence racemose-umbellate, 8–12-flowered; rachis ca. 5 mm. Pedicel 1–1.5 cm, sparsely puberulent; calyx teeth 5, 10–15 mm, glabrous, margin ciliate; corolla funnel-campanulate, white to pink, with purple spots inside, 2.5–3 cm, lobes 5; stamens 10, unequal, 1.2–2.2 cm, filaments pubescent at base; ovary ca. 6 mm, glabrous or sometimes with a few white hairs; style ca. 1.8 cm, glabrous; stigma capitate. Capsule cylindric, straight, 5-valved, 15–20 × 3–4 mm. Fl. May–Jun, fr. Aug.

Coniferous forests, Rhododendron thickets; 3800–4500 m. S Xizang.