玉柄秋海棠 yu bing qiu hai tang

Herbs, rhizomatous. Leaves basal; stipules rose-pink, triangular, 5-7 mm, glabrous, margin entire, apex acuminate; petiole ruby-red, 13-31 cm, glabrous; blade abaxially rufous, adaxially emerald colored, wine colored on veins, obovate, asymmetric, 3-9 × 2-6 cm, thinly leathery, abaxially sparsely rufous tribuloid on veins, adaxially sparsely white tribuloid when young, venation palmate, 6- or 7-veined, base oblique, cordate, margin irregularly crenate, apex acuminate. Inflorescence nearly glabrous; peduncle ruby-red, 9-14 cm; bracts subulate, ca. 10 × 3 mm. Staminate flowers: pedicel ca. 7 mm; tepals 4, pink, outer 2 broadly ovate, 1.4-1.8 × 1.3-1.5 cm, abaxially pilose, inner 2 lanceolate, 1.2-1.4 cm × 5-6 mm; stamens 15-30; filaments fused 2-3 mm at base. Pistillate flowers: pedicel 7-12 mm; tepals 5, pink, ovate, abaxially sparsely pilose; styles 2, fused to halfway; stigmas 2-cleft, spiraled; ovary 2-loculed. Capsule unequally 3-winged; abaxial wing ligulate, apex obtuse; lateral wings smaller, crescent-shaped.

● Evergreen forests; on moist sandstone; ca. 700 m. N Guizhou (Xishui).