WordNet sense 1 (any plant of the genus Argemone having large white or yellow flowers and prickly leaves and stems and pods; chiefly of tropical America):

argemone, prickly poppy, devil's fig

WordNet sense 2 (spiny shrub with silvery-scurfy foliage of alkaline plains of southwestern United States and Mexico):

quail bush, Atriplex lentiformis, quail brush