靖西秋海棠 jing xi qiu hai tang

Begonia mashanica D. Fang & D. H. Qin.

Herbs, rhizomatous. Rhizomes creeping; internodes 0.3-1.1 cm. Leaves all basal; stipules ovate or broadly ovate, 10-12 × 7-10 mm; petiole 3-16 mm, initially whitish hirsute-villous, glabrescent when old; blade obliquely broadly ovate or suborbicular, 3.5-18 × 4-14 cm, herbaceous, abaxially fibrillose, villous on veins, hairs initially whitish, later rusty, adaxially green, dark green, or adorned with a whitish or pale horseshoe-shaped maculation, sparsely appressed rusty fibrillose when young, glabrescent, basally 5-8-veined, base cordate, margin irregularly dentate or denticulate, long ciliate, apex shortly acuminate, obtuse, or rounded. Inflorescences axillary; peduncle 8-23 cm, glabrous or subglabrous; flowers 3-40 in a dichasial cyme; bracts oblong to elliptic, 1-3 × 0.7-1.5 mm, margin sparsely glandular ciliate. Staminate flowers: pedicel 5-17 mm; tepals 2(-4), suborbicular, obovate, or broadly ovate, 1-1.2 × 1-1.3 cm; androecium zygomorphic; stamens 18-30; filaments 1.5-2.5 mm; anthers oblong to obovoid, apex emarginate. Pistillate flowers: pedicel 5-15 mm; tepals 2, suborbicular, obovate, or oblate, 1-1.8 × 1-2.2 cm; ovary 3-loculed at proximal to middle part, placentation septal. Capsule nodding, ovoid, 11-15 × 8-10 mm, unequally 3-winged; abaxial wing lunate or nearly ligulate, 6-8 mm; lateral wings lunate, 2-3 mm. Fl. Jun-Dec, fr. Aug-Dec.

● Limestone hills and entrances to limestone caves, forests; 100-600 m. Guangxi.