Begonia gagnepainiana Irmsch.

Only one gathering (the type) has been seen. This species is similar to Begonia smithiana but differs in having smaller, unlobed leaves.

Herbs. Rhizomes elongate, 2-3 mm in diam. Leaves basal; stipules ovate, 3.5-15 × 2.5-10 mm, glabrous, apex apiculate; petiole 2.5-10 cm, densely rusty villous; blade ovate, asymmetric, 3.5-5 × 2.4-4 cm, abaxially sparsely setulose, adaxially brown hairy, venation palmate, 6-veined, base oblique, deeply cordate, margin irregularly serrulate, apex caudate. Inflorescences 8-13.5 cm, glabrous; bracts ovate-oblong, 7-9 × 2.5-3 mm, margin slightly ciliate, apex acute. Staminate flowers: pedicel 1.4-1.8 cm; tepals 4, outer 2 broadly ovate, nearly as long as wide, abaxially setose, inner 2 oblong-obovate, 8-9 × 4-4.5 mm; stamens numerous; filaments ca. 2.1 mm; anthers obovoid, 1-1.2 mm. Pistillate flowers: pedicel 1-2.1 cm; tepals 5, unequal, largest broadly ovate, nearly as long as wide, 5.8-8 × 5.8-8 mm, abaxially setose, smallest broadly elliptic to oblong-obovate, 4.4-7 × 3.5-4.4 mm; ovary oblong, 3.5-4 × 1.5-2 mm, sparsely long hairy, 2-loculed; placentae axile, bilamellate; styles 2, ca. 3.6 mm, fused to halfway. Capsule unequally 3-winged. Fl. Jul-Aug.

● NE Yunnan (Zhaotong).