Jimson weed (devil's snare, datura, common thornapple, false castor oil)
Datura stramonium

Annual herb to 1.5 m high. Leaves 8–36 cm long, ovate to rhombic, margins deeply lobed, lobe margins coarsely toothed to undulate. Capsule ovoid, 2–4.5 cm long.

Distinguished by hairless or sparsely hairy stems; white to lavender flowers, 6–10 cm long, stigma below to above anthers; erect spiny capsule, with over 100 spines of variable length, on a straight stalk; seeds black or grey, pitted, 2.5–4.5 mm long.