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

432. Rhododendron sperabiloides Tagg & Forrest, Notes Roy. Bot. Gard. Edinburgh. 15: 319. 1927.

糠秕杜鹃 kang bi du juan

Dwarf shrubs 0.6–2 m tall; older branches glabrous, shoots ca. 3 mm in diam. below inflorescence; young shoots with pale rufous tomentum, eglandular. Petiole 5–10 mm, tomentose; leaf blade leathery, oblong-elliptic to oblanceolate, 4.5–8.5 × 1.5–2.4 cm; base rounded; apex obtuse, apiculate; abaxial surface discontinuously rufous tomentose, hairs branched to subrosulate; adaxial surface green, slightly rugose, glabrous, midrib and lateral nerves raised abaxially, grooved adaxially, lateral veins 10–14-paired, raised abaxially, impressed adaxially. Inflorescence umbellate, 4–6-flowered; rachis 2–3 mm, floccose. Pedicel 1–1.3 cm, pale rufous-floccose; calyx lobes 5, small, sparsely tomentose, ciliate; corolla tubular-campanulate, fleshy, crimson to deep red, 3.5–4.5 cm, with 5 basal nectar pouches; lobes 5, ca. 1.2 × 1.5 cm, emarginate; stamens 10, 1.7–3.1 cm, filaments puberulent at base; ovary conoid, tapering into style ca. 5.3 × 3.2 mm, densely rufous-tomentose; style glabrous; stigma capitate. Capsule cylindric, slightly curved, 18–20 × 3–4 mm. Fl. May–Jun, fr. Oct–Nov.

Pinus forests, alpine thickets; 2800–3700 m. SE Xizang, NW Yunnan.


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