罗甸秋海棠 luo dian qiu hai tang

Begonia bellii H. Léveillé; B. yishanensis T. C. Ku.

Herbs, rhizomatous. Rhizomes creeping, 5-11 mm in diam.; internodes 0.8-1.7 cm. Leaves all basal; stipules ovate to triangular-ovate; petiole to 3.5-15 cm; blade abaxially pale green or reddish, adaxially green or brown-green, obliquely ovate, broadly ovate, or suborbicular, 3-13 × 2-11 cm, papery, abaxially pilose-tomentose to sparsely villous, more densely so on veins, adaxially pilose-tomentose, basally 5- or 6-veined, base cordate, margin irregularly serrulate, apex obtuse or acute to acuminate. Inflorescences axillary, flowers 3-17 in a dichasial cyme; peduncle 7-20 cm, glabrous, rarely sparsely pilose; bracts caducous, oblong to ovate. Staminate flowers: tepals 4, outer 2 broadly elliptic, broadly ovate, or orbicular, 1-1.4 × 1-1.4 cm, inner 2 white, broadly oblanceolate, 8-13 × 5-6 mm; androecium zygomorphic; stamens 16-25; filaments 1.4-1.6 mm; anthers 2-celled, obovoid-oblong. Pistillate flowers: tepals 3, outer 2 broadly ovate or oblate, 7-12 × 6-13 mm, apex rounded, inner 1 obovate to oblanceolate, 5-10 × 3-5 mm, apex obtuse; ovary oblong, 5-10 × 3-5 mm, placentae parietal; styles 3, 2.5-3.5 mm, widened upward; stigmas reniform or shallowly C-form, not spirally twisted, papillose all around. Capsule oblong, 8-15 × 4-7 mm, with 3 unequal wings, abaxial wing lunate to subtriangular, 3-7 × 8-15 mm; lateral wings smaller, 1-4 mm. Fl. Jun-Nov, fr. Jul-Dec.

● Semishaded, slightly moist limestone surfaces and caves; 100-400 m. Guangxi (Luocheng, Pingnan, Yishan), Guizhou (Luodian).