Stems 35-85 cm, with short, stout, woody rhizome; roots fibrous. Leaves: leaflets variously lobed and sharply dentate, apex acute, glandular-apiculate; surfaces abaxially pubescent. Inflorescences terminal or axillary, well-defined 3-10-flowered cymes with small scalelike bracts; peduncle not strongly clavate. Flowers: sepals 5-10.5 × 2.5-6.5 mm; stamens 50-75; filaments filiform to club-shaped, 4.5-8.2 mm. Follicles sessile, upright to widely divergent; body widely elliptic to widely obovate, 3.8-7 mm, gradually contracted into style beak; beak 1.1-2.5 mm. Seeds 1.8-2.2 mm, glabrous.