white thistle
n 1: any plant of the genus Argemone having large white or yellow
flowers and prickly leaves and stems and pods; chiefly
of tropical America [syn: prickly poppy, argemone, devil's
fig]
2: spiny shrub with silvery-scurfy foliage of alkaline plains
of southwestern United States and Mexico [syn: quail bush,
quail brush, Atriplex lentiformis]