Drymocallis arguta or Potentilla arguta
(Tall Cinquefoil)
Family: Rosaceae (Rose)
Tall Cinquefoil grows in mountain meadows and forest openings. Flowers are white. Petals and sepals are close to the same length. Leaves are pinnately compound with toothed leaflets. Leaflets tend to get smaller toward the petiole.

Compare to Drymocallis fissa, which has yellow flowers and usually grows at lower elevations.

Vegetation zone:  Montane
Time of bloom:  July - August
Origin:  Native
Eastern Colorado Wildflowers