Prickly Poppy
Argemone polyanthemos

Family: Poppy (Papaveraceae)
AKA: Crested Pricklypoppy, Annual Pricklypoppy
Photo taken on: July 28, 2008
Location: CO SR 69
Life Zones: Plains to foothills
Habitat: Roadsides, disturbed areas

Large, fluttery, brilliant white flowers. Grows to 4ft tall with spiny bluish-green leaves.

Flora of North America reference.