疣梗杜鹃 you geng du juan

Shrubs, to 3 m tall; shoots ca. 5 mm in diam. below inflorescence; young shoots green, glabrous. Petiole cylindric, 18–22 mm, glabrescent; leaf blade leathery, elliptic, 4.5–6.6 × 2–2.8 cm; base cuneate or narrowly rounded; margin revolute; apex obtuse, apiculate; abaxial surface pale green, puberulous; adaxial surface dark green; midrib prominent abaxially, grooved adaxially; lateral veins 13–15-paired, obscure abaxially, impressed adaxially. Inflorescence 7–9-flowered; rachis ca. 6 mm, puberulent. Pedicel slender, 1.5–2.2 cm, warty and glandular; calyx lobes 7, ca. 1.5 mm, glandular; corolla open-campanulate, white, pink at base, 2.5–3 cm, glabrous; lobes 7, suborbicular, ca. 1.2 × 1.3 cm; stamens 14, unequal, 1.3–1.9 cm, filaments white-puberulent; ovary oblong, ca. 4 × 3.3 mm, densely glandular; style 1.6–1.8 cm, densely glandular-hairy; stigma small. Capsule not known. Fl. May.

Pinus forests; 3300–3400 m. W Sichuan.