Loco \Lo"co\, n. (Bot.) Any one of various leguminous plants or weeds besides {Astragalus}, whose herbage is poisonous to cattle, as {Spiesia Lambertii}, syn. {Oxytropis Lambertii}.
Oxytropis lambertii n : tufted locoweed of southwestern United States having purple or pink to white flowers [syn: {purple locoweed}, {purple loco}]