Plants 40–70 cm. Stem solitary, often purplish, erect, puberulent. Basal leaf blade long-ovate in outline, 2–3-pinnate, pinnae 3–4 pairs; petiole 8–15 cm; ultimate segments obovate or oblong, 1–2.5 × 0.5–1.5 cm, abaxially more or less glaucous and hispidulous, base cuneate, 2–4-irregularly-toothed or lobed, margin ciliate. Synflorescence little-branched; peduncles hispid; umbels 2–10 cm across; bracts absent; rays 5–12(–20), 0.3–4 cm, very unequal, pubescent; bracteoles 8–12, linear or lanceolate, longer than flowers, densely pubescent; umbellules 10–20-flowered. Calyx teeth obsolete. Petals white, suborbicular, abaxially pubescent. Styles short. Fruit ovate-ellipsoid, 3–3.5 × 2–3 mm, sparsely puberulous; lateral ribs narrowly winged; vittae 3–4 in each furrow, 6–8(–10) on commissure. Fl. and fr. Jul–Oct. n = 11*.