White Hawkweed
Hieracium albiflorum

Family: Sunflower (Asteraceae)
AKA: White-flowered Hawkweed
Photo taken on: July 1, 2007
Location: Dark Canyon Trail, GV, CO
Life Zones: Foothills to subalpine
Habitat: Woodlands, slopes

Grows to 2ft. Flowers have toothed petals and dark, hairy phyllaries.

Flora of North America reference.