Species PlantsPurple Locoweed

Purple Locoweed

Oxytropis lambertii

CommonPlant
Illustration of Purple Locoweed (Oxytropis lambertii)
Safety note: Toxic to livestock and horses, causing 'locoism' (neurological disorder) when consumed repeatedly.

Purple Locoweed is a native perennial wildflower of dry plains and shortgrass prairies with silvery, hairy leaves and showy purple pea-like flowers. Despite its attractive appearance, it is toxic to horses, cattle, and sheep when consumed regularly, causing a selenium-like neurological condition. It is an important nitrogen-fixer in prairie soils.

Habitat
Dry shortgrass prairies, hillsides, and rangelands of the Great Plains
Diet
Flowers provide nectar for native bees; nitrogen-fixing roots benefit prairie community
How common
Common

Best time to see a Purple Locoweed

The best time to see a Purple Locoweed is May–June, when about 67% of U.S. sightings happen, based on 9,097 research-grade iNaturalist observations.

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