一点血 yi dian xie

Herbs, deciduous. Tubers compressed, 0.8-1.2(-1.5) cm in diam. Leaves usually 1(or 2); stipules caducous, ovate-lanceolate; petiole 11-19(-25) cm, subglabrous; blade sometimes purple abaxially, broadly ovate, slightly asymmetric, 12-20 × 8-18 cm, subglabrous, venation palmate, 6- or 7-veined, base oblique, shallowly cordate, margin irregularly serrulate, shallowly lobed, divided to 1/3 of leaf length; lobes 3-7(-9), apex long caudate. Inflorescences terminal, racemose at base, glabrous; peduncle 8-35(-50) cm; bracts ovate-lanceolate, ca. 5 × 2 mm, membranous, apex acuminate. Staminate flowers: pedicel 1-1.5 cm; tepals 4, pinkish, outer 2 ovate to broadly ovate, 1.1-1.2 × 1.1-1.4 cm, glabrous; inner 2 oblong-obovate, 0.8-1.2 cm × 4-7 mm; stamens 8-13; filaments fused at base, 1.7-2 mm; anthers obovoid-oblong, 1.4-2 mm, apex rounded or emarginate. Pistillate flowers: pedicel 1.8-2.2 cm; tepals 3 or 4, pinkish, outer 2 broadly oblong or suborbicular, 12-14 × 9-10 mm, inner 1 or 2 elliptic, 5-10 × 2-6 mm; ovary glabrous, 3-loculed; placentae axile, undivided; styles 3, ca. 3 mm, nearly free; stigmas U-shaped. Capsule pendulous, trigonous, clavate, 1-1.2 cm × 3-5 mm, wingless. Fl. Aug, fr. Sep.

● Forest understories, on rocks in shaded moist environments on slopes or along streams. Chongqing (Nanchuan), Sichuan (Emei Shan, Hongxi).

This species is similar to Begonia labordei but differs by the undivided placentae and the wingless capsule.