Perennial shrub or subshrub to 1-(3) m tall, ± stellate-hairy, branched, strongly armed; prickles yellow, to c. 1 cm long, glabrous or nearly so. Petioles to c. 5 cm long, prickly. Lamina to c. 9-(20) × 7-(13) cm, ovate to oblong, deeply pinnatisect, scarcely lobed in seedlings; lobes irregular, sinuate, with rounded apices, extending to ⅞ to midrib, with hairs scattered above and ± dense below, sometimes glabrate except for prickles on midrib and main veins; base truncate to rounded. Cymes few-flowered; pedicels to c. 1 cm long, densely stellate-hairy, ± pendent at fruiting; peduncle densely stellate-hairy. Calyx 3-12 mm long, often densely stellate-hairy, sometimes prickly, accrescent; lobes ovate to oblong, c. = tube. Corolla (2)-2.5-3.5-(4) cm diam., mauve or violet, stellate-hairy outside; lobes broadly ovate. Anthers 4-6 mm long. Berry 1.5-3-(3.5) cm diam., globose or nearly so, mottled green and white when immature, yellow at maturity; stone cells 0. Seeds c. 3 mm diam., subglobose to broad-obovoid.