Argemone pleiacantha Prickly Poppy
ANNUAL. A tall, coarse, showy plant with extremely prickly greenish-blue
leaves, large silky white flowers, and oval, prickly seedpods. In
the Empires, common on roadsides, cow tanks, other recently disturbed ground.
Blooms in May-late summer. A. mexicana has smaller, creamy
yellow flowers. I have not found it in the Empires yet, but it is
well established at a cow tank just west of Davidson Canyon.
FAMILY: Papaveraceae (Poppy Family)