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Plant said to be shrubby but probably a much-branched perennial herb; stems rather sparsely pilose or setose-pilose, with one or two longitudinal lines of pubescence changing their radial position at each node, rather densely aculeate with stout usually unbranched deflexed prickles.
Calyx up to 22 mm. long, 10-veined, hispid or setose-pilose; lobes ovate-acute, aculeate on the margins, joined for up to 4 mm. at the base.
Epicalyx of usually 9 bracts; bracts up to 10 mm. long, forked, the inner branch linear, the outer branch ovate to ovate-lanceolate.
Flowers 4–5 cm. in diam., yellow with a violet centre, solitary, axillary; peduncle 4–8 mm. long, hispid.
Capsule up to 2 × 1·5 cm., subreniform, surface minutely faveolate.
Petals 4–5 cm. long, pubescent.
