太行白前Cynanchum taihangense Tsiang et Zhang
太行白前Cynanchum taihangense Tsiang et Zhang
35. 太行白前（植物分类学报）
Cynanchum taihangense Tsiang et Zhang in Acta Phytotax. Sinica 12. 102. Pl. 20. 1974.
草质藤本；须根丛生；茎单生，中空，下部直立，上部略为缠绕，被微毛，高达1米。叶纸质，偶革质，椭圆形，长15厘米，宽7厘米，基部楔形，顶端短渐尖，叶面在叶脉上被微毛，叶背被绒毛，叶柄长1.5厘米；中间的叶长10厘米，宽4.5厘米，顶端渐尖，叶柄长1厘米；上部的叶长5.5厘米，宽1.8厘米，顶端渐尖，叶柄长不到1厘米。花序腋间生，二至五出，比叶短，着花约8朵；花序梗长2-4.5厘米，略被微毛；花直径7毫米；花萼裂片狭三角形，长2毫米，宽0.5毫米，顶端渐狭，外面被微毛，有缘毛，内面无毛，在湾缺处有小腺体；花冠裂片黄绿色，长圆形，长5毫米，宽2毫米，顶端圆形，无毛；副花冠5裂，比合蕊柱为短，裂片三角状半圆形；雄蕊长方形，下部略小，顶端膜片三角形；花粉块长圆形，与着粉腺等长；柱头圆形，顶端近扁平。花期6-8月。
产于山西的太行山、小西天及运城雪花山等地。生长于山地灌木丛中。模式标本采自山西太行山小西天。
《Flora of China》 Vol. 16 (1995)
Cynanchum taihangense Tsiang & Zhang
太行白前 tai hang bai qian
Cynanchum gracilipes Tsiang & Zhang; Vincetoxicum gracilipes (Tsiang & Zhang) C. Y. Wu & D. Z. Li; V. taihangense (Tsiang & Zhang) C. Y. Wu & D. Z. Li.
Stems simple, to 1.5 m, hollow when dry, puberulent, basal part erect, apical part twining. Leaves opposite; petiole 1-3.5 cm; leaf blade narrowly elliptic to elliptic, 8-23 × 2.5-10 cm, membranous or thin papery, pubescent to puberulent, base cuneate, apex acuminate or caudate-acuminate; lateral veins 6-8 pairs. Inflorescences umbel-like, usually dichotomous, shorter than leaves; peduncle 2-5 cm, puberulent. Pedicel 1-2 cm. Sepals lanceolate, 1.5-2.5 × 0.5-0.7 mm, puberulent to glabrous outside, ciliate; basal glands present or absent. Corolla yellow-green, rotate; tube short; lobes oblong, 5-7.5 × 2-2.5 mm. Corona slightly shorter than gynostegium; lobes broadly ovate-triangular, obtuse to subacute, adnate to anthers. Anthers nearly square, apical membrane ovate-triangular; pollinia oblong. Stigma head elevated. Fl. Jun-Aug.
* Thickets along valleys. Anhui, Shanxi.
科名：萝藦科 Asclepiadaceae
属名：鹅绒藤属 Cynanchum
35. 太行白前（植物分类学报）
Cynanchum taihangense Tsiang et Zhang in Acta Phytotax. Sinica 12. 102. Pl. 20. 1974.
草质藤本；须根丛生；茎单生，中空，下部直立，上部略为缠绕，被微毛，高达1米。叶纸质，偶革质，椭圆形，长15厘米，宽7厘米，基部楔形，顶端短渐尖，叶面在叶脉上被微毛，叶背被绒毛，叶柄长1.5厘米；中间的叶长10厘米，宽4.5厘米，顶端渐尖，叶柄长1厘米；上部的叶长5.5厘米，宽1.8厘米，顶端渐尖，叶柄长不到1厘米。花序腋间生，二至五出，比叶短，着花约8朵；花序梗长2-4.5厘米，略被微毛；花直径7毫米；花萼裂片狭三角形，长2毫米，宽0.5毫米，顶端渐狭，外面被微毛，有缘毛，内面无毛，在湾缺处有小腺体；花冠裂片黄绿色，长圆形，长5毫米，宽2毫米，顶端圆形，无毛；副花冠5裂，比合蕊柱为短，裂片三角状半圆形；雄蕊长方形，下部略小，顶端膜片三角形；花粉块长圆形，与着粉腺等长；柱头圆形，顶端近扁平。花期6-8月。
产于山西的太行山、小西天及运城雪花山等地。生长于山地灌木丛中。模式标本采自山西太行山小西天。
《Flora of China》 Vol. 16 (1995)
Cynanchum taihangense Tsiang & Zhang
太行白前 tai hang bai qian
Cynanchum gracilipes Tsiang & Zhang; Vincetoxicum gracilipes (Tsiang & Zhang) C. Y. Wu & D. Z. Li; V. taihangense (Tsiang & Zhang) C. Y. Wu & D. Z. Li.
Stems simple, to 1.5 m, hollow when dry, puberulent, basal part erect, apical part twining. Leaves opposite; petiole 1-3.5 cm; leaf blade narrowly elliptic to elliptic, 8-23 × 2.5-10 cm, membranous or thin papery, pubescent to puberulent, base cuneate, apex acuminate or caudate-acuminate; lateral veins 6-8 pairs. Inflorescences umbel-like, usually dichotomous, shorter than leaves; peduncle 2-5 cm, puberulent. Pedicel 1-2 cm. Sepals lanceolate, 1.5-2.5 × 0.5-0.7 mm, puberulent to glabrous outside, ciliate; basal glands present or absent. Corolla yellow-green, rotate; tube short; lobes oblong, 5-7.5 × 2-2.5 mm. Corona slightly shorter than gynostegium; lobes broadly ovate-triangular, obtuse to subacute, adnate to anthers. Anthers nearly square, apical membrane ovate-triangular; pollinia oblong. Stigma head elevated. Fl. Jun-Aug.
* Thickets along valleys. Anhui, Shanxi.