Argemone munita var. argentea (G. B. Ownbey) Shinners

Stems greenish white, 4-8 dm, with 100-300 prickles per cm² on main stem below capsule, longest prickles 7-10 mm. Leaf blades: surfaces usually densely prickly on veins and intervein areas. Inflorescences: bud prickles simple. Capsules densely prickly, surface partially obscured, prickles unequal, longest 7-10 mm. 2 n = 28.

Flowering spring; fruiting spring-summer. Dry desert ranges; 150-850 m; Ariz., Calif., Nev.