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

207. Rhododendron calophytum Franchet, Bull. Soc. Bot. France. 33: 230. 1886.

美容杜鹃 mei rong du juan

Shrubs or trees, 2–12 m tall; bark grayish, falling off in flakes; young shoots stout, green, white-tomentose, glabrescent. Petiole 20–25 mm, glabrous; leaf blade leathery, oblong-oblanceolate to oblong-lanceolate, 11–30 × 4–7.8 cm; base cuneate; apex acute to acuminate; abaxial surface pale green, glabrous or sparsely tomentose; adaxial surface bright green, glabrous; midrib grooved adaxially, lateral veins 18–22-paired and impressed. Inflorescence racemose-umbellate, 15–30-flowered; rachis 15–20 mm, hairy. Pedicel stout, red, 2–6.5 cm, glabrous; calyx lobes 5, ca. 1.5 mm, glabrous; corolla widely campanulate, pinkish to white, with purple flecks and a basal blotch, or purple, 4–5 cm, lobes 5–7, deeply emarginate; stamens 15–22, unequal, 1.5–2.6 cm, filaments glabrous or puberulent at base; ovary ovoid, ca. 6 mm, glabrous; style ca. 3 cm, glabrous; stigma swollen, discoid, 5–6 mm in diam. Capsule obliquely ovoid, 20–45 mm; style persistent. Fl. Apr–May, fr. Sep–Oct.

Forests; 1400–4000 m. Chongqing, SE Gansu, C and N Guizhou, W Hubei, S Shaanxi, Sichuan, NE Yunnan.


1 Leaf blade 18–30 cm; pedicels 3–6.5 cm; corolla open-campanulate, 5–7-lobed.   (2)
+ Leaf blade 10–15 cm; corolla campanulate or oblique-campanulate, 5-lobed.   (3)
       
2 (1) Rachis 15–20 mm; inflorescence 15–30-flowered; corolla widely campanulate, 5–7-lobed.   207a var. calophytum
+ Rachis ca. 10 mm; inflorescence 3–7-flowered; corolla campanulate, 5-lobed.   207b var. pauciflorum
       
3 (1) Pedicel 3–4.5 cm; leaf blade 2–3.5 cm wide; pedicel 3–4.5 cm; corolla obliquely campanulate, white.   207c var. openshawianum
+ Pedicel 2–2.5 cm; leaf blade 3–4 cm wide; pedicel 2–2.5 cm; corolla campanulate, purple.   207d var. jinfuense

Lower Taxa


 

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