Melandrium dioicum (White Campion)
Family: Caryophyllaceae (Pink)
    
Melandrium dioicum is a dioecious species. A male plant is shown in the first photo, and a female plant is pictured in the second photo.
Vegetation zone:  Plains, Foothills, Montane
Time of bloom:  June - August
Origin:  Introduced
Eastern Colorado Wildflowers