Mexican poppy

Argemone ochroleuca

Erect annual herb to 1.5 m high. Leaves 6–20 cm long, mottled white and dark green, with undulate margins and yellow-spined lobes. Capsule 1.5–4 cm long, ovoid, with a remnant style (often attached after capsule has split), splitting from the top on maturity. Seeds dark brown or black, finely pitted on the surface.