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Purple Locoweed

Oxytropis lambertii

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Category
Forb / Wildflower
Sun
Full
Soil moisture
Medium-Dry to Dry
Bloom time
Apr–Jun
Bloom color
Purple
Notes
Legume

About Purple Locoweed

Purple Locoweed is a tough and beautiful member of the pea family that thrives in the challenging conditions of the Great Plains and Rocky Mountains. This low-growing perennial produces a basal rosette of silvery-green, pinnate leaves from which several upright stems emerge, topped with dense spikes of vibrant, deep purple flowers. Blooming from late April through June, these showy flowers are a vital early-season nectar source for bumblebees and other native pollinators. As a legume, it has the unique ability to fix nitrogen in the soil, benefiting the surrounding plant community. Native to dry upland prairies, hillsides, and rocky pastures, it is exceptionally drought-tolerant and requires full sun and well-drained soil. While its common name comes from its potential toxicity to livestock if consumed in large quantities, it is a valuable and attractive component of native prairie ecosystems. Its compact size and striking floral display make it perfect for rock gardens or dry, sunny native plantings.

Native range

Native to 15 states:

ArizonaColoradoIowaKansasMinnesotaMissouriMontanaNorth DakotaNebraskaNew MexicoOklahomaSouth DakotaTexasUtahWyoming

County range map

BONAP county-level native range map for Oxytropis lambertii

Range map courtesy of BONAP (Biota of North America Program).

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