Argemone munita subsp. rotundata
Stems usually purplish, 4-10 dm, with 120-500 prickles per cm⊃2; on main stem below capsule, longest prickles 4-6 mm. Leaf blades: surfaces usually densely prickly on veins and intervein areas. Inflorescences: bud prickles sometimes branched. Capsules usually densely prickly, surface partially obscured, prickles unequal, longest to 8 mm. 2n = 28.
Phenology: Flowering spring–fall; fruiting summer–fall.
Habitat: Open slopes and foothills, full sun
Elevation: 1200-2500 m
Ariz., Calif., Idaho, Nev., Oreg., Utah.