瓣萼杜鹃 ban e du juan

Shrubs, 1.2–3 m tall; shoots 6–7 mm in diam. below inflorescence; young shoots brown-tomentose and sparsely setose. Petiole 10–15 mm, tomentose; leaf blade leathery, obovate, 6–9 × 3–5.2 cm; base cuneate; margin revolute; apex rounded, apiculate; abaxial surface with indumentum 2-layered, pale cinnamon, upper layer loosely tomentose, hairs dendroid, lower layer whitish, compacted; adaxial surface dark green, glabrous; midrib grooved adaxially; lateral veins 9–11-paired, impressed. Inflorescence 7–9-flowered; rachis ca. 8 mm, tomentose. Pedicel 2.2–3.5 cm, with same indumentum; calyx cupular, 1.3–2 cm; lobes 5, oblong, ca. 11 × 6 mm, glabrous except for ciliate margin; corolla tubular-campanulate, fleshy, crimson, ca. 4 cm, with 5 deep crimson basal nectar pouches; lobes 5, suborbicular, ca. 1.2 × 1.8 cm, emarginate; stamens 10(–12), 1.5–2 cm, filaments glabrescent; ovary with truncate apex, ca. 5 mm, densely rufous-tomentose; style ca. 1.6 cm, glabrous; stigma small. Capsule oblong, 20–25 × 10–12 mm, rough. Fl. Jun–Jul, fr. Sep–Oct.

Alpine thickets; 3900–4200 m. SE Xizang, NW Yunnan.