糙叶秋海棠Begonia asperifolia Irmsch.
糙叶秋海棠Begonia asperifolia Irmsch.
57.糙叶秋海棠（中国高等植物图鉴补编）
Begonia asperifolia Irmsch. in Mitt. Inst. Allg. Bot. Hamburg 6: 359. 1927, et l. c. 10: 502. 1939; Hand. -Mazz. Symb. Sin. 7: 389. 1931; Yu in Bull. Fan Mem. Inst. Biology new ser. 1 (2): 118. 1948;中国高等植物图鉴补编2: 535, 543, in clavi. 1983; C. Y. Wu et al. Index Fl. Yunnan. 1: 348. 1984; 西藏植物志3: 314, 图版29, 图1-3. 1986; L. B. Smith et al. Smithson. Contr. Sin. 60: 27, 33, 34, in clavi, 140, Pl. 9, fig. 10. 1986.
《Flora of China》 Vol. 13 (2007)
Begonia asperifolia Irmscher
糙叶秋海棠 cao ye qiu hai tang
Herbs, deciduous. Tubers subglobose, 1.3-2 cm in diam. Leaves 1(or 2), basal, occasionally with short stem; stipules caducous; petiole (8-)15-23(-28) cm, subglabrous or tomentose; blade broadly ovate, asymmetric, 15-20(-30) × 11-18(-20) cm, abaxially pubescent, more densely so on veins, or rusty tomentose, adaxially sparsely pubescent or densely strigose, venation palmate, 6-8-veined, base slightly oblique, cordate, margin irregularly serrulate, undivided or very shallowly lobed. Inflorescences terminal, racemose at base, 12-25 cm tall, subglabrous; bracts oblong-ovate to ovate, 5-6 × 1-1.2 cm, membranous, apex obtuse. Staminate flowers: pedicel 1-1.5(-2.5) cm; tepals 4, pink, glabrous, outer 2 suborbicular, 1.1-1.3 × 1-1.2 cm, inner 2 oblong to ovate-oblong, 8-10 × 5-7 mm; stamens numerous; filaments free; anthers oblong. Pistillate flowers: pedicel 2-2.5 cm; tepals 5, pink, unequal, obovate to suborbicular, 5-11 × 3-9 mm, glabrous; ovary elliptic, ca. 7 × 5 mm, glabrous, 3-loculed; placentae axile, bilamellate; styles 3, free; stigmas U-shaped, slightly spiraled. Capsule pendulous, oblong to obovoid-oblong, unequally 3-winged; abaxial wing triangular or obliquely so, 1.2-1.4(-1.9) cm; lateral wings 3-4 mm, rarely absent or reduced to very narrow lamellae. Fl. Aug-Oct, fr. Sep-Nov.
● Broad-leaved forests, mixed broad-leaved and coniferous forests, along streams, rocky slopes; (1500-)1800-3400 m. SE Xizang, W Yunnan.
Similar to Begonia labordei, this species differs by its large, somewhat rugulose leaves and 5-tepaled pistillate flowers (in B. labordei, the pistillate flowers have 3(or 4) tepals). Some specimens of intermediate size and lacking pistillate flowers are difficult to identify.
别名：粗叶秋海棠;红天葵;
科名：秋海棠科 Begoniaceae
属名：秋海棠属 Begonia
57.糙叶秋海棠（中国高等植物图鉴补编）
Begonia asperifolia Irmsch. in Mitt. Inst. Allg. Bot. Hamburg 6: 359. 1927, et l. c. 10: 502. 1939; Hand. -Mazz. Symb. Sin. 7: 389. 1931; Yu in Bull. Fan Mem. Inst. Biology new ser. 1 (2): 118. 1948;中国高等植物图鉴补编2: 535, 543, in clavi. 1983; C. Y. Wu et al. Index Fl. Yunnan. 1: 348. 1984; 西藏植物志3: 314, 图版29, 图1-3. 1986; L. B. Smith et al. Smithson. Contr. Sin. 60: 27, 33, 34, in clavi, 140, Pl. 9, fig. 10. 1986.
《Flora of China》 Vol. 13 (2007)
Begonia asperifolia Irmscher
糙叶秋海棠 cao ye qiu hai tang
Herbs, deciduous. Tubers subglobose, 1.3-2 cm in diam. Leaves 1(or 2), basal, occasionally with short stem; stipules caducous; petiole (8-)15-23(-28) cm, subglabrous or tomentose; blade broadly ovate, asymmetric, 15-20(-30) × 11-18(-20) cm, abaxially pubescent, more densely so on veins, or rusty tomentose, adaxially sparsely pubescent or densely strigose, venation palmate, 6-8-veined, base slightly oblique, cordate, margin irregularly serrulate, undivided or very shallowly lobed. Inflorescences terminal, racemose at base, 12-25 cm tall, subglabrous; bracts oblong-ovate to ovate, 5-6 × 1-1.2 cm, membranous, apex obtuse. Staminate flowers: pedicel 1-1.5(-2.5) cm; tepals 4, pink, glabrous, outer 2 suborbicular, 1.1-1.3 × 1-1.2 cm, inner 2 oblong to ovate-oblong, 8-10 × 5-7 mm; stamens numerous; filaments free; anthers oblong. Pistillate flowers: pedicel 2-2.5 cm; tepals 5, pink, unequal, obovate to suborbicular, 5-11 × 3-9 mm, glabrous; ovary elliptic, ca. 7 × 5 mm, glabrous, 3-loculed; placentae axile, bilamellate; styles 3, free; stigmas U-shaped, slightly spiraled. Capsule pendulous, oblong to obovoid-oblong, unequally 3-winged; abaxial wing triangular or obliquely so, 1.2-1.4(-1.9) cm; lateral wings 3-4 mm, rarely absent or reduced to very narrow lamellae. Fl. Aug-Oct, fr. Sep-Nov.
● Broad-leaved forests, mixed broad-leaved and coniferous forests, along streams, rocky slopes; (1500-)1800-3400 m. SE Xizang, W Yunnan.
Similar to Begonia labordei, this species differs by its large, somewhat rugulose leaves and 5-tepaled pistillate flowers (in B. labordei, the pistillate flowers have 3(or 4) tepals). Some specimens of intermediate size and lacking pistillate flowers are difficult to identify.