Argemone munita subsp. robusta
Mem. Torrey Bot. Club 21: 77. 1958.
Stems 5-16 dm, with 0-10 prickles per cm⊃2; on main stem below capsule. Leaf blades: abaxial surface sparingly prickly on main veins. Capsules scattered-prickly, surface not obscured, prickles nearly equal, longest 6-8 mm. 2n = 28.
Phenology: Flowering spring–summer; fruiting summer–fall.
Habitat: Dry, rocky soil, full sun
Elevation: 1500-1700 m
Of conservation concern.
Argemone munita subsp. robusta is endemic to the Santa Ana Mountains.