粗喙秋海棠Begonia crassirostris Irmsch.
粗喙秋海棠Begonia crassirostris Irmsch.
种拉丁名：Begonia crassirostris Irmsch.
科中文名：秋海棠科
科拉丁名：Begoniaceae
属中文名：秋海棠属
属拉丁名：Begonia
国内分布：赣,湘,黔,闽,粤,桂,滇,琼
海 拔：600-2200
中国植物志：52(1):150
《Flora of China》 Vol. 13 (2007)
Begonia longifolia Blume
粗喙秋海棠 cu hui qiu hai tang
Begonia aptera Hayata (1911), not Blume (1827), nor Roxburgh (1832), nor Decaisne (1834); B. crassirostris Irmscher; B. hayatae Gagnepain.
Herbs, erect. Rhizomes short, stout. Stems 0.5-1.5 m tall, well branched. Leaves cauline; stipules caducous, narrowly to broadly ovate, to 2.4 × 1.9 cm, glabrous, apex acuminate; petiole 8-15 cm, glabrous or subglabrous; blade lanceolate to broadly lanceolate, asymmetric, 8.5-29 × 3.4-11 cm, glabrous or subglabrous, venation palmate-pinnate, 7-10-veined, base oblique, cordate, margin remotely and irregularly denticulate. Inflorescences strongly reduced, to 5 cm, pendulous; bracts caducous, ovate to narrowly triangular, to 1.9 × 1.2 cm, thickly papery, glabrous, margin entire, apex mucronate to acuminate. Staminate flowers: pedicel 5-12 mm; tepals 4, white, outer 2 oblong to very broadly ovate, 0.9-1.3 cm × 5-10 mm, glabrous, inner 2 elliptic, 0.6-1.5 cm × 4-8.2 mm; stamens 49-93; filaments free, 0.7-2.5 mm; anthers lorate to broadly lorate, 1.7-2.6 mm, apex emarginate. Pistillate flowers: pedicel 5-12 mm; tepals 6, white, subequal, broadly elliptic to orbicular, 7-12 × 5-9 mm; ovary glabrous, 3-loculed; placentae axile, bilamellate; styles 3, fused at base; stigmas 2-cleft, spiraled. Capsule pendulous, subglobose, 1.1-1.8 cm in diam., wingless or 3-horned. Fl. Apr-May, fr. Jul. 2n = 22*.
Forests, shaded moist environments; 200-2200 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Taiwan, Yunnan [Bhutan, NE India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].
Nearly all species of Begonia are very narrowly distributed. Begonia longifolia is probably the most widespread species in the genus. It resembles B. acetosella when sterile, differing by being monoecious, having a 3-loculed ovary, 6-tepaled pistillate flowers, and a remotely denticulate leaf margin.
科名：秋海棠科 Begoniaceae
属名：秋海棠属 Begonia
种拉丁名：Begonia crassirostris Irmsch.
科中文名：秋海棠科
科拉丁名：Begoniaceae
属中文名：秋海棠属
属拉丁名：Begonia
国内分布：赣,湘,黔,闽,粤,桂,滇,琼
海 拔：600-2200
中国植物志：52(1):150
《Flora of China》 Vol. 13 (2007)
Begonia longifolia Blume
粗喙秋海棠 cu hui qiu hai tang
Begonia aptera Hayata (1911), not Blume (1827), nor Roxburgh (1832), nor Decaisne (1834); B. crassirostris Irmscher; B. hayatae Gagnepain.
Herbs, erect. Rhizomes short, stout. Stems 0.5-1.5 m tall, well branched. Leaves cauline; stipules caducous, narrowly to broadly ovate, to 2.4 × 1.9 cm, glabrous, apex acuminate; petiole 8-15 cm, glabrous or subglabrous; blade lanceolate to broadly lanceolate, asymmetric, 8.5-29 × 3.4-11 cm, glabrous or subglabrous, venation palmate-pinnate, 7-10-veined, base oblique, cordate, margin remotely and irregularly denticulate. Inflorescences strongly reduced, to 5 cm, pendulous; bracts caducous, ovate to narrowly triangular, to 1.9 × 1.2 cm, thickly papery, glabrous, margin entire, apex mucronate to acuminate. Staminate flowers: pedicel 5-12 mm; tepals 4, white, outer 2 oblong to very broadly ovate, 0.9-1.3 cm × 5-10 mm, glabrous, inner 2 elliptic, 0.6-1.5 cm × 4-8.2 mm; stamens 49-93; filaments free, 0.7-2.5 mm; anthers lorate to broadly lorate, 1.7-2.6 mm, apex emarginate. Pistillate flowers: pedicel 5-12 mm; tepals 6, white, subequal, broadly elliptic to orbicular, 7-12 × 5-9 mm; ovary glabrous, 3-loculed; placentae axile, bilamellate; styles 3, fused at base; stigmas 2-cleft, spiraled. Capsule pendulous, subglobose, 1.1-1.8 cm in diam., wingless or 3-horned. Fl. Apr-May, fr. Jul. 2n = 22*.
Forests, shaded moist environments; 200-2200 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Taiwan, Yunnan [Bhutan, NE India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].
Nearly all species of Begonia are very narrowly distributed. Begonia longifolia is probably the most widespread species in the genus. It resembles B. acetosella when sterile, differing by being monoecious, having a 3-loculed ovary, 6-tepaled pistillate flowers, and a remotely denticulate leaf margin.