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

234. Rhododendron auriculatum Hemsley, J. Linn. Soc., Bot. 26: 20. 1889.

耳叶杜鹃 er ye du juan

Shrubs or small trees, 5–10 m tall; bark grayish; older branches glabrous; young shoots densely long glandular-setulose. Leaf buds long-conical, 3.5–5.5 cm; outer bud scales narrow, ca. 3.5 cm; apex acuminate, glabrous. Petiole stout, 18–30 mm, densely glandular; leaf blade leathery, oblong-elliptic, oblong-lanceolate to oblanceolate, 9–12 × 3–6.5 cm; base rounded or auriculate, unequal; margin cartilaginous, glandular-ciliate; apex obtuse, cuspidate; abaxial surface pale green, gland-tipped-villous, especially on midrib and main veins, also glandular; adaxial surface green, glabrous; midrib raised abaxially, grooved adaxially; lateral veins 20–22-paired, raised abaxially. Inflorescence large and loose, 7–15-flowered; rachis 20–30 mm, glandular. Pedicel 2–3 cm, densely glandular-hairy; calyx undulate, membranous, 2–4 mm, glandular; corolla funnelform, fragrant, white or cream to rose, 6(–10) cm, glandular-hairy outside, lobes 7; stamens 14–16, 2.5–3.4(–4) cm, filaments slender, glabrous; ovary ovoid, ca. 6 mm, 8-locular, densely glandular-hairy; style stout, ca. 3 cm, glandular to tip. Capsule terete, curved, distinctly ribbed, 30–40 mm. Fl. Jul–Aug, fr. Sep–Oct.

Forests, valleys, mountain slopes; 600–2000 m. N Guizhou, W Hubei, S Shaanxi, E Sichuan.


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