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FOC | Family List | FOC Vol. 14 | Apiaceae | Rhododendron

267. Rhododendron ochraceum Rehder & E. H. Wilson in Sargent, Pl. Wilson. 1: 534. 1913.

峨马杜鹃 e ma du juan

Shrubs, 2–6 m tall; older branches glabrescent; young shoots glandular-setose and sparsely tomentose. Petiole 10–15 mm, glandular-hairy and pubescent; leaf blade subleathery, oblanceolate, 5–8.5 × 1.2–2.5 cm; base cuneate or rounded; apex cuspidate or acuminate, shortly cuspidate; abaxial surface indumentum 1-layered, loosely woolly or spongy, midrib glandular-hairy and floccose; adaxial surface almost glabrous, midrib glandular and with vestigial hairs; midrib prominent abaxially, grooved adaxially; lateral veins 11–13-paired. Inflorescence 8–12-flowered; rachis ca. 6 mm, pubescent. Pedicel 0.6–1.2 cm, densely glandular-hairy; calyx red, cupular; teeth 5, ca. 1.5 mm, puberulent; corolla open-campanulate, crimson, without spots, 2.7–4 cm, glabrous; lobes 5, suborbicular, ca. 1 × 1.2 cm, emarginate; stamens 10–12, unequal, 1.2–1.9 cm, filaments glabrous; ovary conoid, ca. 3.5 × 3 mm, densely glandular-setose; style glabrous. Capsule cylindric, 18–25 × 3–5 mm, persistently glandular-setose. Fl. May–Jul, fr. Aug–Sep.

Forests, thickets; 1700–3000 m. Chongqing (Nanchuan), S Sichuan, NE Yunnan.


1 Abaxial leaf surface with a loosely woolly tomentum; corolla 2.7–3 cm; capsule 18–25 × ca. 3 5 mm.   267a var. ochraceum
+ Abaxial leaf surface with a thick spongy indumentum; corolla ca. 4 cm; capsule ca. 13 × 6 mm.   267b var. brevicarpum

Lower Taxa


 

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