Any of various leguminous plants of the genera Astragalus and Oxytropis, chiefly of arid regions of North America, that are poisonous to livestock and cause the nervous disorder known as locoism.
Ranchers scour the range for locoweed after spring rains to protect their herds.
locoweedadjective
Relating to, caused by, or characteristic of locoweed.
The veterinarian diagnosed the horse with locoweed poisoning.