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FOC | Family List | FOC Vol. 13 | Begoniaceae | Begonia

111. Begonia palmata D. Don, Prodr. Fl. Nepal. 223. 1825.

裂叶秋海棠 lie ye qiu hai tang

Herbs, 20-90 cm tall. Rhizomes elongate, to 2.1 cm in diam. Stem erect, brown villous, floccose-pubescent, or tomentose. Leaves basal and cauline; stipules caducous, narrowly ovate, to 2.8 × 1.8 cm, margin ciliate, apex cuspidate; petiole 5-40 mm, brown villous, floccose-pubescent, or tomentose; blade asymmetric, ovate or oblate-orbicular, 12-33 × 6-27 cm, adaxially hispidulous, sometimes tomentose, venation palmate, 5-10-veined, base oblique, slightly cordate to cordate, margin remotely and shallowly denticulate, shallowly to distinctly divided; lobes 3-7, apex acuminate to long acuminate. Inflorescences tomentose; bracts caducous, ovate, 0.7-1.5 cm × 4-8 mm, abaxially brown villous or tomentose, margin ciliate, apex acute. Staminate flowers: pedicel 1-2 cm; tepals 4, white to pink, outer 2 obovate to orbicular, 1-2.6 × 0.8-2.4 cm, abaxially villous or tomentose, inner 2 oblanceolate to narrowly obovate, 0.8-2.4 cm × 5-9 mm; stamens 100-200; filaments 0.8-2.4 mm; anthers narrowly obovoid, 1.9-2.3 mm. Pistillate flowers: pedicel 1-2 cm; tepals 5(-7), unequal, oblanceolate to orbicular, largest 0.8-2.4 × 0.8-2.2 cm, abaxially pubescent, smallest 0.8-2.1 cm × 4-9 mm; ovary brown tomentose or villous, 2-loculed; placentae axile, bilamellate; styles fused at base; stigmas 2-cleft, spiraled. Capsule nodding, obovoid, ca. 15 × 8 mm, unequally 3-winged; abaxial wing oblong or oblique-triangular, 1.1-3.2 cm; lateral wings much smaller. Fl. Jun-Aug, Nov-Dec, fr. Jul-Nov. 2n = 22*, 24*.

Evergreen broad-leaved forests, scrubby vegetation, by streams or on slopes in valleys, on rocks in moist environments by streams; 100-3200 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Sichuan, Taiwan, Xizang, Yunnan [Bangladesh, Bhutan, NE India, Laos, Myanmar, Nepal, Thailand, Vietnam].

1 Stem and petiole twisted brown woolly- tomentose or twisted-tomentose   (2)
+ Stem and petiole erect- or floccose-pubescent or tomentose on local part   (3)
2 (1) Blade adaxially hirsute.   111a var. palmata
+ Blade adaxially densely hispidulous, occasionally mixed hirsute.   111b var. bowringiana
3 (1) Abaxial surface of leaf blade, petiole, and stem when young hispidulous and sparsely hirsute, glabrescent; blade lobed, base subrounded, subequal.   111c var. laevifolia
+ Abaxial surfaces of leaf blade, and stem erect- or floccose-pubescent, petiole sometimes tomentose, blade parted, asymmetric at base   (4)
4 (3) Stem and both surfaces of leaf blade brown floccose-hirsute; petiole brown tomentose.   111d var. difformis
+ Stem, petiole, and abaxial surface of leaf blade hirsute, adaxially hispidulous (hairs rounded at base).   111e var. crassisetulosa


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