Comandra umbellata (Bastard Toadflax)
Family:
Santalaceae (Sandalwood)
  
Despite the common name Bastard Toadflax, Comandra umbellata is neither a noxious weed nor closely related to Dalmatian or Yellow Toadflax. Bastard Toadflax is a native plant, blooming in spring and early summer on dry sites. What appear to be white petals are actually sepals, and the flower has no true petals. The plants are usually 3" to 12" tall.

Vegetation zone:  Plains, Foothills
Time of bloom:  April - July
Origin:  Native
Eastern Colorado Wildflowers