Life (root) » Plantae (plants) » Tracheophyta (Vascular Plants) » Angiospermae (Flowering Plants) » Magnoliopsida (Dicots) » Ranunculales (buttercups, poppies, and allies) » Papaveraceae (poppy family) » Papaveroideae » Argemone (prickly poppies) » Argemone pleiacantha (southwestern prickly poppy)