Lithospermum incisum (Narrowleaf Puccoon)
Family:
Boraginaceae (Borage)
           
Compare to Lithospermum multiflorum (Many-flowered Puccoon). Many-flowered Puccoon has smooth edges on the petals and a wider opening at the top of the throat.

Vegetation zone:  Plains, Foothills, Montane  (3500 - 9500 ft.)
Time of bloom:  April - July
Origin:  Native
Eastern Colorado Wildflowers