Argemone L.

Sepals 3. Petals 6 Argemone
Petals cream to pale yellow. Capsule with numerous spines. Widespread. Weed of cultivation and waste places. Introd. from North America. Fl. summer. Mexican Poppy Argemone ochroleucaochroleuca
Petals deep yellow. Capsule with few stout spines. Hunter River Valley. Weed of cultivated land. Introd. from N. America. Fl. summer. American Poppy Argemone subfusiformissubfusiformis