Datura ferox

Stout herb to 1 m high; branches glabrous or sparsely pubescent with simple hairs. Leaves broad-ovate and angular to rounded-triangular with few shallow lobes that are toothed or sinuate, mostly 8–14 cm long, 6–16 cm wide, apex acute, base more or less truncate, glabrous; petiole to c. 8 cm long. Flowers erect on short indistinct pedicels; calyx 5-lobed, to 3.5 cm long, lobes 4–7 mm long; corolla 4–6 cm long, white, limb 5-lobed, the lobes ending in a point 1–2 mm long; stamens not exserted, anthers 3–4 mm long; style c. 3 cm long, stigma below anthers. Capsule more or less ellipsoid, to c. 4 cm long, erect, spiny, opening by 4 valves; spines usually 40–60, stout, conical, sharp, variable in length, the longest near capsule apex and 10–15 mm long; persistent calyx-base to 8 mm long; seeds 4–5 mm long, black or grey. Flowers mainly summer.