大果杜鹃 da guo du juan

Shrubs evergreen, to 4 m tall; shoots ca. 5 mm in diam. below inflorescence; young shoots glandular-setose. Petiole cylindric, 16–30 mm, densely shortly glandular-hairy when young; leaf blade leathery, oblong-lanceolate to oblanceolate, 10–19 × 3.8–4.5 cm; base cuneate; margin revolute; apex acuminate; both surfaces glabrous; abaxial surface pale green; adaxial surface green, midrib prominent abaxially, grooved adaxially; lateral veins 20–22-paired. Inflorescence umbellate, lax, 5- or 6-flowered, rachis ca. 20 mm, densely shortly glandular-hairy. Pedicel ca. 2.5 cm, glandular-hairy; calyx ca. 3 mm, glandular; corolla funnel-campanulate, white, 5–6 cm, glandular-hairy outside; lobes 7 or 8, broadly rounded, ca. 1.5 × 2 cm, emarginate; stamens 14–16, unequal, 3–4.5 cm, filaments glabrous; ovary conoid, densely glandular-hairy; style glandular. Capsule cylindric, 20–30 mm. Fr. Oct–Nov.

Forests, hill summits; 2300–2400 m. NE Yunnan.