Chorispora tenella
(Blue Mustard)
Family: Brassicaceae (Mustard)

Blue Mustard is a common spring weed, sometimes filling fields with a blanket of blue-purple flowers. In the Mustard Family, flowers have four petals arranged in a cross. The long seed pods (siliques) are held upright. Plants can flower at heights from 2-inches in mowed areas to 2-feet tall.

Vegetation zone:   Plains, Foothills (4200 - 9000 ft.)
Time of bloom:   March - June
Origin:   Introduced
Eastern Colorado Wildflowers