Vasilis Teodoridis:
Euphorbiaceae | Alchornea
1. Alchornea rugosa (Loureiro) Müller Argoviensis; Linnaea. 34: 170. 1865.
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Shrubs or small trees; 1.5-5 m tall; dioecious. Branchlets pubescent when young; becoming glabrous. Stipules subulate; 5-7 mm; petiole 0.5-3 cm; leaf blade cuneate-obovate or elliptic to broadly lanceolate; 10-21 x 4-10 cm; thickly papery; base obtuse or slightly cordate; with 2 glands; stipels absent; margins serrulate; apex acuminate; venation pinnate; lateral veins 8-12 pairs. Inflorescence terminal; branched; 7-25 cm; puberulent or glabrous; bracts triangular; ca. 1.5 mm; base usually with 2 glands. Male flowers 5-11 per bract; pedicel ca. 0.5 mm; buds globose; ca. 1 mm in diam.; pilose; sepals 2-4; stamens 4-8. Female flowers: pedicel ca. 1 mm; pubescent; sepals 5; triangular; pubescent; ovary densely puberulent; styles 3; filiform. 3.5-7 mm. Fruiting pedicel ca. 2 mm; capsule 3-lobed; ca. 8 mm in diam.; subglabrous. Seeds ovoid; ca. 5 mm; brownish; verrucate. Fl. and fr. year-round.
Forests; below 600 m. Guangdong; Guangxi; Hainan; Yunnan [India (Nicobar Island); Indonesia; Malaysia; Myanmar; New Guinea; Philippines; Thailand; N Australia].
1b. Alchornea rugosa var. pubescens (Pax & K. Hoffmann) H. S. Kiu; Fl. Reipubl. Popularis Sin. 44(2): 69. 1996.
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Alchornea hainanensis var. pubescens Pax & K. Hoffmann in Engler; Pflanzer. 63(IV. 147. VII): 243. 1914.
Leaf blade uniformly densely yellowish pubescent. Styles 3.5-4 mm. Fl. and fr. Mar-Nov.
? Forests on limestone hills; 100-300 m. SW Guangxi; Hainan.