A shrub. It grows 1 m tall. The leaf blade is 10 cm long by 9 cm wide. It is oval and can have 3 lobes. The flowers are large and yellow with a purple centre. They are 3-5 cm across. The leaves and stems have stinging hairs. The fruit is a capsule 15 mm long by 12 mm wide. The seeds are 2.5 mm long and wide.
Flowers 3–5 cm. in diam., yellow (usually without a dark centre, at least in our area), solitary, axillary and often forming rather congested terminal racemes by reduction of the upper leaves; peduncle usually up to 5 mm. long, stellate-setose.
Calyx 5–6 mm. long, cupuliform, usually slightly shorter than the epicalyx; lobes very narrowly triangular with 1 prominent central nerve and broad sinuses.
Epicalyx of 5 bracts; bracts 16 × 3 mm., very narrowly lanceolate to linear-lanceolate, acute, joined for 1–1·5 mm. at the base.
Erect herb about 1 m. tall; stems densely patent-or subappressed-stellate-setose and pubescent.
Capsule 15 × 12–14 mm., subglobose to broadly ellipsoid; awns 2·5–3 mm. long.
Seeds 2·5 × 2·5 mm., angular subreniform, sparsely and minutely lepidote.
Petals 5–6 × 4–5 cm., obliquely obovate, tomentose outside when in bud.
Staminal tube 15–20 mm. long; free parts of filaments 1–1·2 mm. long.
Flowers large, yellow with purple centre.
Stellate-hirsute becoming glabrous
Style-branches 2–3 mm. long.
A tall undershrub