Begonia truncatiloba Irmsch.

This species is similar to Begonia edulis but differs by the truncate lobes of the leaf blade.

Herbs, to 80 cm tall. Rhizomes elongate. Stems to 1.7 cm in diam. Leaves basal and cauline; stipules oblong, to 4 cm, glabrous, apex acute, acuminate, or cuspidate; petiole to 45 cm, densely minutely hairy; blade ovate or oblate-orbicular, asymmetric, 8-30 × 9-30 cm, densely minutely hairy when young, venation palmate, 7-9-veined, base slightly oblique, deeply cordate, margin irregularly denticulate, shallowly lobed, divided to 1/3 of leaf length; lobes 5-7, apex acuminate. Inflorescences subglabrous; bracts caducous, ovate, to 2 cm, glabrous. Staminate flowers: pedicel 0.6-1.9 cm; tepals 4, white, outer 2 ovate, 1.5-1.8 × 1.1-1.7 cm, glabrous, inner 2 obovate, 1.1-1.6 cm × 5.5-10 mm; stamens more than 200; filaments 2-4.2 mm; anthers oblong, 1.3-2.5 mm. Pistillate flowers: pedicel ca. 1.5 cm; tepals 5, white, unequal, largest ovate, 1.5-1.6 × 1.1-1.2 cm, smallest ca. 1.3 × 0.8 cm; ovary glabrous or minutely hairy when young, 2-loculed; placentae axile, bilamellate; styles 2, ca. 5.4 mm, free; stigmas 2-cleft, spiraled. Capsule nodding, oblong-elliptic, 1.8-2.1 cm × 7-10 mm, unequally 3-winged; abaxial wing broadly ligulate, 1.3-1.5 × 1-1.3 cm, apex obtuse; lateral wings smaller, 3-5 mm. Fl. May, fr. Jun. 2n = 22*.

SE Yunnan.

● Forests or in scrubby vegetation, shaded moist environments on slopes, in valleys or along streams; 1000-1600 m.