百脉根（学名：Lotus corniculatus）是一种豆科植物。这种植物在中国南北等地均有栽培。在云南、贵州、四川、湖北、湖南、陕西、甘肃等地区均发现有野生种。

Lotus corniculatus is a common flowering plant in the pea family Fabaceae, native to grassland in temperate Eurasia and North Africa. Common names include common bird's-foot trefoil and just bird's-foot trefoil, though the common name is often also applied to other members of the genus. It is also known in cultivation in North America as bird's-foot deervetch.