棘豆属（学名：Oxytropis）是蝶形花科下的一个属，为草本或小灌木植物。该属共有约300种，分布于北温带。

Oxytropis is a genus of plants in the legume family. It is one of three genera of plants known as locoweeds, and are notorious for being toxic to grazing animals. The other locoweed genus is the closely related Astragalus. There are about 300 species, native to Eurasia and North America. Several species are native to the Arctic. These are hairy perennial plants which produce raceme inflorescences of pink, purple, white, or yellow flowers which are generally pea-like but have distinctive sharply beaked keels. The plant produces legume pods containing the seeds.