Erysimum capitatum (Western Wallflower)
Family:
Brassicaceae (Mustard)
           
Flowers of Erysimum capitatum range from deep orange-red to bright yellow. Seed pods (siliques) are held upright and parallel to the stem.  E. capitatum is difficult to separate from E. asperum.

Vegetation zone:  Montane, Subalpine, Alpine
Time of bloom:  March - August
Origin:  Native
Eastern Colorado Wildflowers