河口秋海棠 he kou qiu hai tang

Begonia gesnerioides S. H. Huang & Y. M. Shui, Acta Bot. Yunnan. 16: 341. 1994, not L. B. Smith & B. G. Schubert (1941).

Herbs, to 30 cm tall. Rhizomes ca. 9 mm in diam. Stems brown appressed hairy. Leaves basal and cauline; stipules caducous; petiole 22-24 cm, brown appressed hairy; blade ovate or broadly elliptic, slightly asymmetric, ca. 14.5 × 2.5 cm, abaxially brown appressed hairy, adaxially hispidulous, base nearly rounded or very shallowly cordate, margin irregularly denticulate, apex acuminate. Inflorescences hairy; peduncle 2.3-5 cm; bracts lanceolate to triangular-lanceolate, 5-6 mm, margin ciliate, apex acuminate. Staminate flowers: pedicel ca. 1.3 cm; tepals 4, orange-red, outer 2 broadly ovate, ca. 13 × 8 mm, villous, inner 2 elliptic, ca. 8 × 5 mm; stamens numerous; filaments ca. 1 mm; anthers oblong, ca. 1 mm. Pistillate flowers: pedicel ca. 1.5 cm; tepals 5, unequal, largest broadly ovate, 1.3-1.5 × 6-8 mm, outside purplish brown villous; ovary densely purplish brown villous, 2-loculed; placentae axile, bilamellate; styles 2, fused at base; stigmas 2-cleft, spiraled. Capsule nodding, ovoid-oblong, ca. 12 × 6-8 mm, unequally 3-winged; abaxial wing ligulate, ca. 1.5 × 1.2 cm; lateral wings triangular, ca. 6 × 12 mm, purplish brown villous. Fl. Jul-Sep, fr. Sep-Oct.

● Forest understories; 200-500 m. Yunnan (Hekou).