Herbs, rhizomatous, 25-37 cm tall. Rhizomes ca. 1 cm in diam. Stems erect or ascending, sparsely hairy. Leaves mostly basal; stipules caducous; petiole 1-2.5 cm, rusty hairy; blade broadly ovate to orbicular, slightly asymmetric, 7-15(-18) × 7-13(-20) cm, thin when dried, sparsely pilose, apex acuminate, venation palmate, base cordate, obliquely cordate, margin serrulate, distinctly lobed, divided to 1/2 of leaf length, 6- or 7-lobed; lobes triangular-ovate, middle lobe divided with 1 lobule. Inflorescences sparsely hairy; peduncle 18-20 cm; bracts caducous. Staminate flowers: pedicel 2.5-3 cm; tepals 4, pink, outer 2 broadly ovate, 1.7-2 × 1.8-2.1 cm, abaxially pilose, inner 2 oblong-obovate, 1.5-2 cm × 9-11 mm; stamens numerous; filaments 1.5-1.8 mm; anthers obovoid-oblong, 1.1-1.5 mm, apex slightly emarginate. Pistillate flowers: pedicel 1.7-2.1 cm, hairy; tepals 5, unequal, largest one broadly ovate, 1.6-2.1 × 1.1-1.4 cm, abaxially villous, smallest one oblong-elliptic, ca. 11 × 7 mm, glabrous; ovary elliptic, 8-10 × 5-6 mm, pilose, 2-loculed; placentae axile, bilamellate; styles 2, 5-6.5 mm; stigmas 2-cleft, spiraled. Capsule nodding, ellipsoid, unequally 3-winged; abaxial wing triangular or broadly ligulate, 1.3-1.8 cm × 9-10 mm, apex rounded; lateral wings oblate-triangular. Fl. Jul, fr. Aug.

This species is similar to Begonia edulis but differs by its sparsely pilose, distinctly lobed leaves.

● Forests; on rocks in shaded moist environments by streams or in valleys; 500-700 m. Fujian, Jiangxi, Zhejiang.