白前属（Cynanchum），又称鹅绒藤属、牛皮消属，是萝摩科下的一个属，包括超过300种植物，主要分布于热带和亚热带地区，部分也分布在温带，许多种类可入药。

• Cynanchum at Flora of China

Cynanchum is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek kynos (meaning "dog") and anchein ("to choke"), hence the common name for several species is dog-strangling vine. Most species are non-succulent climbers or twiners. There is some evidence of toxicity.