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FOC | Family List | FOC Vol. 11 | Euphorbiaceae | Croton

6. Croton yunnanensis W. W. Smith, Notes Roy. Bot. Gard. Edinburgh. 13: 159. 1921.

云南巴豆 yun nan ba dou

Croton duclouxii Gagnepain; C. yunnanensis var. megadontus W. T. Wang.

Shrubs 1-3 m tall; indumentum grayish yellow stellate-tomentose; branches subglabrous, gray-brown. Petiole 1-4 cm, densely stellate-hairy; leaf blade rotund, 5-9 × 4-7 cm, thinly leathery, abaxially densely stellate-tomentose, adaxially glabrescent, margins irregularly serrulate, base of midrib with 2 sessile cupular glands; basal veins 5. Inflorescence terminal, 10-15 cm. Male flowers: sepals elliptic, pubescent outside; petals oblong, apex woolly; stamens 12; filament bases pubescent. Female flowers: sepals ovate-lanceolate, ca. 5 × 2 mm, stellate-hairy outside, glabrous inside; petals oblong, smaller than sepals, woolly; ovary subglobose, densely stellate-hairy. Capsules ovoid-globose, 7-8 × 6-7 mm, stellate-puberulent. Seeds ellipsoidal, 5-6 × ca. 4 mm, smooth, with brown spot-stripes. Fl. Aug-Sep, fr. Sep-Oct.

● Montane scrub or sparse forests; 1000-2200 m. SW Sichuan, W Yunnan.


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