山白前Cynanchum fordii Hemsl.
山白前Cynanchum fordii Hemsl.
39. 山白前（中国高等植物图鉴）图版131
Cynanchum fordii Hemsl. in Journ. Linn. Soc. Bot. 26:106. 1889: Dunn et Tutch. in Kew Bull. Misc. Inf. a. s. 10: 171. 1912; 中国高等植物图鉴, 3: 483,图4920. 1974. ——Vincetoxicum fordii O. Kuntze, Rev. Gen. Pars 1: 424. 1891.
缠绕性藤本；茎被两列柔毛。叶对生，长圆形或卵状长圆形，长3.5-4.5厘米，宽1.5-2厘米（最大的10 × 5厘米），顶端短渐尖，基部截形，稀微心形或圆形，两面均被散生柔毛，脉上较密；侧脉4-6对；叶柄0.5-2厘米，上端有丛生腺体。伞房状聚伞花序腋生，长约4厘米，着花5-15朵，花直径7毫米；花萼裂片卵状三角形，外面被微柔毛，边缘有毛，花萼内面基部腺体5枚；花冠黄白色，无毛，裂片长圆形，长9毫米，宽3毫米；花粉块每室1个，下垂，卵状长圆形；柱头略凸起，微2裂。蓇葖单生，无毛，披针形，长5-5.5厘米，直径1厘米，向端部长渐尖；种子扁卵形；种毛白色绢质，长2.5厘米。花期5-8月，果期8-12月。
产于福建、湖南、广东和云南等省。生长于海拔300米左右的山地林缘或山谷疏林下或路边灌木丛中向阳处。模式标本采自广东博罗县罗浮山。
《Flora of China》 Vol. 16 (1995)
Cynanchum fordii Hemsley
山白前 shan bai qian
Vincetoxicum fordii (Hemsley) Kuntze.
Stems twining to 2 m, pubescent along 2 lines. Leaves opposite; petiole 0.5-2 cm; leaf blade oblong or ovate-oblong, 3.5-10 × 1.5-5 cm, sparsely pubescent, base truncate, rarely subcordate or rounded, apex short acuminate; lateral veins 4-6 pairs. Inflorescences extra axillary, corymbose or umbel-like, ca. 4 cm, to 15-flowered. Sepals ovate-triangular, puberulent; basal glands 5. Corolla yellow-white, ca. 7 mm in diam., glabrous; lobes oblong, ca. 9 × 3 mm. Corona lobes 5, thin, rounded, shorter than gynostegium, each attached adaxially to anther. Pollinia ovate-oblong. Stigma head slightly elevated. Follicles lanceolate in outline, 5-6 × ca. 1 cm. Seeds ovate, flattened; coma ca. 2.5 cm. Fl. May-Aug, fr. Aug-Dec.
* Open woodland, thickets; 200-800 m. Fujian, Guangdong, Hubei, Hunan, Yunnan.
科名：萝藦科 Asclepiadaceae
属名：鹅绒藤属 Cynanchum
39. 山白前（中国高等植物图鉴）图版131
Cynanchum fordii Hemsl. in Journ. Linn. Soc. Bot. 26:106. 1889: Dunn et Tutch. in Kew Bull. Misc. Inf. a. s. 10: 171. 1912; 中国高等植物图鉴, 3: 483,图4920. 1974. ——Vincetoxicum fordii O. Kuntze, Rev. Gen. Pars 1: 424. 1891.
缠绕性藤本；茎被两列柔毛。叶对生，长圆形或卵状长圆形，长3.5-4.5厘米，宽1.5-2厘米（最大的10 × 5厘米），顶端短渐尖，基部截形，稀微心形或圆形，两面均被散生柔毛，脉上较密；侧脉4-6对；叶柄0.5-2厘米，上端有丛生腺体。伞房状聚伞花序腋生，长约4厘米，着花5-15朵，花直径7毫米；花萼裂片卵状三角形，外面被微柔毛，边缘有毛，花萼内面基部腺体5枚；花冠黄白色，无毛，裂片长圆形，长9毫米，宽3毫米；花粉块每室1个，下垂，卵状长圆形；柱头略凸起，微2裂。蓇葖单生，无毛，披针形，长5-5.5厘米，直径1厘米，向端部长渐尖；种子扁卵形；种毛白色绢质，长2.5厘米。花期5-8月，果期8-12月。
产于福建、湖南、广东和云南等省。生长于海拔300米左右的山地林缘或山谷疏林下或路边灌木丛中向阳处。模式标本采自广东博罗县罗浮山。
《Flora of China》 Vol. 16 (1995)
Cynanchum fordii Hemsley
山白前 shan bai qian
Vincetoxicum fordii (Hemsley) Kuntze.
Stems twining to 2 m, pubescent along 2 lines. Leaves opposite; petiole 0.5-2 cm; leaf blade oblong or ovate-oblong, 3.5-10 × 1.5-5 cm, sparsely pubescent, base truncate, rarely subcordate or rounded, apex short acuminate; lateral veins 4-6 pairs. Inflorescences extra axillary, corymbose or umbel-like, ca. 4 cm, to 15-flowered. Sepals ovate-triangular, puberulent; basal glands 5. Corolla yellow-white, ca. 7 mm in diam., glabrous; lobes oblong, ca. 9 × 3 mm. Corona lobes 5, thin, rounded, shorter than gynostegium, each attached adaxially to anther. Pollinia ovate-oblong. Stigma head slightly elevated. Follicles lanceolate in outline, 5-6 × ca. 1 cm. Seeds ovate, flattened; coma ca. 2.5 cm. Fl. May-Aug, fr. Aug-Dec.
* Open woodland, thickets; 200-800 m. Fujian, Guangdong, Hubei, Hunan, Yunnan.