小叶秋海棠 xiao ye qiu hai tang

Herbs, deciduous. Tubers ca. 8 mm in diam. Leaves usually 2 or 3, basal; stipules ovate-lanceolate, membranous, caducous; petiole 4-6.5 cm, hairy; blade broadly ovate, nearly symmetric, 2-3.4(-4) × 2-4 cm, pilose or subglabrous, venation palmate, 5-7-veined, base cordate, margin crenate, apex obtuse. Inflorescences terminal, 4.5-7 cm tall, with 2 or 3 flowers; bracts obovate-oblong, margin serrate. Staminate flowers: pedicel ca. 2.8 cm; tepals 4, pinkish, outer 2 oblate-orbicular, ca. 8 × 11 mm, glabrous or abaxially hairy, inner 2 oblong, 8-9 × ca. 3.5 mm; stamens numerous; filaments 1-1.5 mm, free; anthers obovoid, ca. 1 mm, apex emarginate. Pistillate flowers: tepals 5, unequal, largest oblate to obovate, 8-9 × 7-10 mm, glabrous or abaxially hairy, smallest oblong-obovate, 6-7 × 2.5-4 mm; ovary glabrous or hairy, 3-loculed; placentae axile, undivided; styles 3, fused to halfway; stigmas 2-cleft, U-shaped. Capsule pendulous, unequally 3-winged; abaxial wing triangular; lateral wings smaller. Fl. Sep. 2n = 28*.

● On rocks; 200-1300 m. Guizhou, Yunnan.

This species is similar to Begonia henryi but differs by its 4-tepaled staminate flowers and 5-tepaled pistillate flowers.