Stout herb to 1 m high; branches tomentose with erect glandular hairs. Leaves broad-ovate, mostly 6–20 cm long, 3–12 cm wide, virtually entire, apex acute, base cuneate, often asymmetric, lower surface sparsely to densely tomentose, upper surface less so; petiole to c. 10 cm long. Flowers erect on short indistinct pedicels; calyx 3–6-lobed, 5–11 cm long, lobes 13–20 mm long, sometimes not completely separating; corolla 12–19 cm long, white with green veins, limb undulate, apparently 10-lobed, alternate lobes triangular or ending in a slender point 5–10 mm long; stamens not exserted, anthers 8–10 mm long; style 10–14 cm long, stigma well below anthers. Capsule subglobose, 3–5 cm long, deflexed, spiny, opening irregularly; spines numerous, slender, sharp, c. equal in length, to c. 10 mm long; persistent calyx-base to 20 mm long; seeds 4–5 mm long, brown. Flowers mainly summer.
LoM, MuM, Wim, VRiv, RobP, MuF, Gold. Also naturalised WA, NT, SA, Qld, NSW. Native to Mexico and ?South America. Widespread in north and north-west Victoria often in disturbed sites.
