Tragia ramosa (Branched Noseburn)
Euphorbiaceae (Spurge)
The dark green, toothed leaves of Tragia ramosa are covered with stinging hairs, much like Stinging Nettle. Flowers are tiny and inconspicuous. Female and male flowers are separate but both occur on a single plant.  Above, the second photo shows male (staminate) flowers, the third photo shows a female (carpellate) flower and the fourth photo shows a fruit.

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