《中国植物志》|| 秋海棠科 BEGONIACEAE ||单座非盾叶系 Ser. Wilsonianae Ku ||一点血 Begonia wilsonii Gagnep.

69.一点血（峨眉植物图谱）一点血秋海棠（中国高等植物图鉴），一点红
Begonia wilsonii Gagnep. in Bull. Mus. Hist. Nat. Paris 25: 281. 1919, et in Lecomte, Fl. Gen. Indo-Chine 2: 1097. in clavi, 1921: Irmsch. in Mitt. Inst. Allg. Bot. Hamburg 10: 511. 1939; W. P. Fang, Icon. Pl. Omeians 2 (2): Pl. 153. 1946; Yu in Bull. Fan Mem. Inst. Biology new ser. 1 (2): 127. 1948;中国高等植物图鉴2: 943, 图3616. 1972; 中国高等植物图鉴补编2: 537, 541, in clavi. 1983; L. B. Smith et al in Smithson. Contr. Bot. 60: 25, 26, in clavi, 250, Pl. 8, fig. 27. 1986.
多年生无茎草本。根状茎横走，粗壮，呈念珠状，长2-5厘米，直径8-12（-15）毫米，表面凹凸不整，节间长6-8毫米，周围长出多数细长纤维状之根。叶全部基生，通常1（-2），具长柄；叶片两侧略不相等至明显不相等，轮廓菱形至宽卵形，稀长卵形，长12-20厘米，宽8-18厘米，先端长尾尖，基部心形，微偏斜至甚偏斜，窄侧呈圆形，宽侧下延长1-2厘米，呈宽圆耳状，边缘常3-7（-9)浅裂，裂片三角形，并有大小不等三角形之齿，齿尖常有短芒，上面深绿色，下面淡绿色，有时两面均带暗紫色，两面近无毛，掌状6-7条脉，窄侧2-3条，宽侧3-4条，脉均直达叶缘；叶柄长11-19 (-25)厘米，近无毛；托叶卵状披针形，早落。花葶高4-12厘米，柔弱，无毛；花粉红色，5-10朵，排成2-3回二歧聚伞状，花序梗长8-35（-50）毫米，无毛；花梗柔弱，长1-1.8（-22)厘米，无毛；苞片和小苞片均膜质，卵状披针形，长约5毫米，宽约2毫米，先端渐尖；雄花：花被片4，外轮2枚，卵形至宽卵形，长1-1.4厘米，宽8-10毫米，先端圆，基部近圆形，外面无毛，内轮2枚，长圆倒卵形，长约8毫米，宽约4毫米，先端圆，基部楔形，雄蕊8-10枚，花丝长2-3毫米，离生，花药倒卵长圆形，长约2毫米，顶端圆或微凹；雌花：花被片3，外轮2枚，宽长圆形或近圆形，长约10毫米，宽约9毫米，先端圆，内轮1，椭圆形，长5-6毫米，宽约2毫米，先端钝，基部楔形；子房纺锤形，无毛，3室，有中轴胎座，每室胎座具1裂片；花柱3，基部或1/2的部分合生，柱头3裂，顶端向外膨大呈头状或环状并带刺状乳突。蒴果下垂，果梗长1-1.5厘米，无毛，轮廓纺锤形，长1-1.2厘米，直径3-5毫米，无毛，无翅，具3棱；种子极多数，小，长圆形，淡褐色。花期8月，果期9月开始。
产四川（洪溪、峨眉山和南川）。生于山坡密林下、沟边石壁上或山坡阴处岩石上，海拔700-1950米。模式标本采自四川峨眉山。

《Flora of China》|| Begoniaceae || Begonia ||一点血 Begonia wilsonii

166. Begonia wilsonii Gagnepain, Bull. Mus. Natl. Hist. Nat. 25: 281. 1919.

一点血 yi dian xie

Herbs, deciduous. Tubers compressed, 0.8-1.2(-1.5) cm in diam. Leaves usually 1(or 2); stipules caducous, ovate-lanceolate; petiole 11-19(-25) cm, subglabrous; blade sometimes purple abaxially, broadly ovate, slightly asymmetric, 12-20 × 8-18 cm, subglabrous, venation palmate, 6- or 7-veined, base oblique, shallowly cordate, margin irregularly serrulate, shallowly lobed, divided to 1/3 of leaf length; lobes 3-7(-9), apex long caudate. Inflorescences terminal, racemose at base, glabrous; peduncle 8-35(-50) cm; bracts ovate-lanceolate, ca. 5 × 2 mm, membranous, apex acuminate. Staminate flowers: pedicel 1-1.5 cm; tepals 4, pinkish, outer 2 ovate to broadly ovate, 1.1-1.2 × 1.1-1.4 cm, glabrous; inner 2 oblong-obovate, 0.8-1.2 cm × 4-7 mm; stamens 8-13; filaments fused at base, 1.7-2 mm; anthers obovoid-oblong, 1.4-2 mm, apex rounded or emarginate. Pistillate flowers: pedicel 1.8-2.2 cm; tepals 3 or 4, pinkish, outer 2 broadly oblong or suborbicular, 12-14 × 9-10 mm, inner 1 or 2 elliptic, 5-10 × 2-6 mm; ovary glabrous, 3-loculed; placentae axile, undivided; styles 3, ca. 3 mm, nearly free; stigmas U-shaped. Capsule pendulous, trigonous, clavate, 1-1.2 cm × 3-5 mm, wingless. Fl. Aug, fr. Sep.

● Forest understories, on rocks in shaded moist environments on slopes or along streams. Chongqing (Nanchuan), Sichuan (Emei Shan, Hongxi).

This species is similar to Begonia labordei but differs by the undivided placentae and the wingless capsule.