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

217. Rhododendron oreodoxa Franchet, Bull. Soc. Bot. France. 33: 230. 1886.

山光杜鹃 shan guang du juan

Shrubs or small trees, 1–8(–12) m tall; shoots ca. 4 mm in diam. below inflorescence; young shoots gray-tomentose, glabrescent. Petiole 10–25 mm, glandular when young; leaf blade leathery, elliptic or obovate-elliptic, 4.5–10 × 2–3.5 cm; base rounded; apex obtuse or rounded, apiculate; both surfaces glabrous; abaxial surface pale green; adaxial surface dark green; midrib grooved adaxially; lateral veins 13–15-paired. Inflorescence 6–8(–12)-flowered; rachis ca. 5 mm, glandular and tomentose. Pedicel purple, 0.5–1.5 cm, sparsely glandular-hairy or sparsely wispy brown-tomentose; calyx lobes 6 or 7, 1–3 mm, glandular outside; corolla campanulate, pale pink, 3.5–4.5 cm, lobes 5–8, orbicular, ca. 1 cm; stamens 12–14, filaments glabrous or pubescent; ovary conoid, 5–8 mm, glabrous or glandular-hairy; style 2.8–3.4 cm, glabrous or densely glandular-hairy, stigma small. Capsule cylindric, slightly curved, 18–32 mm. Fl. Apr–Jun, fr. Aug–Oct.

Forests, thickets; 1800–3900 m. S Gansu, W Hubei, S Shaanxi, Sichuan, E Xizang.

1 Ovary glabrous; corolla 7- or 8-lobed.   217a var. oreodoxa
+ Ovary densely glandular; corolla 5–7-lobed.   (2)
2 (1) Pedicel sparsely wispy brown-tomentose; corolla 5-lobed.   217b var. shensiense
+ Pedicel with glands only; corolla 6- or 7-lobed.   (3)
3 (2) Style glandular-hairy; stamens 14–15.   217c var. adenostylosum
+ Style glabrous; stamens 12–14.   217d var. fargesii

Lower Taxa


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