山麻杆 shan ma gan

Acalypha silvestrii Pampanini.

Deciduous shrubs, 1-5 m tall. Branchlets gray tomentulose, becoming puberulent. Stipules lanceolate, 6-8 mm, pubescent; petiole 2-10 cm, pubescent; leaf blade broadly ovate or subrounded, 8-15 × 7-14 cm, papery, abaxially puberulent, adaxially puberulous along veins, base cordate to subtruncate, with 2-4 glands, stipels filiform, 3-4 mm, margins dentate or serrulate, apex acuminate; basal veins 3. Plants dioecious. Male inflorescences 1-3 at leafless node, unbranched, catkinlike, 1.5-3.5 cm; peduncle subsessile; bracts ovate, ca. 2 mm, pubescent, overlapping in bud. Male flowers 3-5 per bract; pedicel ca. 2 mm; bud globose, ca. 2 mm in diam., glabrous; sepals 3(or 4); stamens 6-8. Female inflorescences terminal, unbranched, 4-8 cm, pubescent; bracts triangular, ca. 3.5 mm. Female flowers: pedicel ca. 0.5 mm; sepals 5, triangular, 2.5-3 mm, pubescent; ovary subglobose, tomentose; styles 3, filiform, 10-12 mm, connate for 1.5-2 mm. Capsule subglobose, 3-lobed, 10-12 mm, densely pubescent. Seeds ovoid, ca. 6 mm, brownish or gray, tuberculate. Fl. Apr-May, fr. Jun-Jul.

● Valleys, slopes of streams or rivers, deciduous forests; 300-2000 m. Fujian, NE Guangdong, N Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shanxi, Sichuan, NE Yunnan, Zhejiang.