Crataegus erythropoda (Cerro Hawthorn)
Family:
Rosaceae (Rose)
  
Crataegus erythropoda is a small tree that grows on dry hillsides. Leaves are shallowly lobed with black-tipped teeth. Thorns are about 1-inch long. Leaves and petioles are glabrous (hairless).

Vegetation zone:  Foothills
Time of bloom:  May - June
Origin:  Native
Eastern Colorado Wildflowers