Agrimonia striata (Grooved Agrimony)
Family: Rosaceae (Rose)
  
Agrimony flowers are yellow and appear in long racemes. Bell-shaped fruits have grooves along their sides and burr-like hooks that attach to passing animals or hikers. Leaves are pinnately compound with toothed leaflets.

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