268. Rhododendron pachytrichum Franchet, Bull. Soc. Bot. France. 33: 231. 1886.
绒毛杜鹃 rong mao du juan
Shrubs, 1.5–5 m tall; older branches glabrous; young shoots tomentose. Petiole 15–20 mm, tomentose and glandular-hairy, rapidly glabrescent; leaf blade leathery or subleathery, oblong-elliptic or oblanceolate to obovate, 5–14 × 2–4.5 cm; base cuneate or rounded; margin ciliate when young; apex obtuse to acuminate, sometimes cuspidate; abaxial surface hairs short-branched; adaxial surface green, glabrous, midrib prominent abaxially, floccose-tomentose, grooved adaxially; lateral veins 14–19-paired. Inflorescence racemose-umbellate, 7–10-flowered; rachis 15–20 mm, pubescent. Pedicel 1–1.5 cm, tomentose; calyx teeth 5, ca. 2 mm, triangular; corolla campanulate, white to pink, with deep purple basal blotch, 3–4.5 cm, lobes 5, suborbicular, 1–1.5 × 1.3–2 cm, emarginate; stamens 10, unequal, 2–2.5 cm; filaments pubescent at base; ovary conoid, ca. 7 mm; ovary densely rufous-tomentose; style 2–4.5 cm, glabrous. Capsule 15–26 × 4–5 mm, ferruginous-tomentose or glabrescent. Fl. May–Jun, fr. Aug–Sep.
Forests; 1700–3500 m. Chongqing, S Shaanxi, SW Sichuan, NE Yunnan.
