周裂秋海棠(Begonia circumlobata)

周裂秋海棠(Begonia circumlobata)

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FOC | Family List | FOC Vol. 13 | Begoniaceae | Begonia
25. Begonia circumlobata Hance, J. Bot. 21: 203. 1883.
周裂秋海棠 zhou lie qiu hai tang
Herbs, rhizomatous. Rhizomes elongate, 6-21 mm in diam. Leaves basal; stipules ovate, 5-8 × 3-5.5 mm, glabrous, margin entire, apex acuminate and apiculate; petiole 8-43 cm, glabrous to densely villous; blade broadly ovate to oblate-orbicular, 10-24 cm, sparsely hispidulous, sparsely strigose on veins, venation palmate, base subtruncate or shallowly cordate, margin irregularly denticulate, distinctly divided; lobes 5 or 6, apex acuminate. Inflorescences 5-25 cm tall; bracts oblong, 0.9-1.4 cm × 3-11 mm, glabrous, margin entire. Staminate flowers: pedicel 1.5-4.6 cm; tepals 4, white to pink, outer 2 broadly ovate, 1-1.6 × 9-1.4 cm, abaxially sparsely brown hairy, inner 2 oblong, 0.8-1.3 cm × 5-8 mm; stamens ca. 100; filaments 1-2.9 mm; anthers obovoid, 0.9-1.6 mm. Pistillate flowers: pedicel 8-17 mm; tepals 5, unequal, largest suborbicular, 1.6-1.8 cm × 8-11 mm, smallest oblong, ca. 12 × 6 mm; ovary pilose, 2-loculed; placentae axile, bilamellate; styles 2, fused to halfway; stigmas 2-cleft, spiraled. Capsule nodding, obovoid, ca. 1.3 cm × 5-6 mm, unequally 3-winged; abaxial wing ligulate, 1.2-2.1 cm, apex obtuse; lateral wings smaller. Fl. Jun, fr. Jul.
● Shaded moist forests, scrubby vegetation; 200-1100 m. Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan.
This species is similar to Begonia pedatifida but differs by lacking lobules.



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