Plants 30–100 cm. Stem glabrous, dichotomously branching above. Basal leaf blade triangular-orbicular in outline, 2–3-ternate; basal pinnae long-petiolulate; ultimate segments obovate-cuneate, 1.2–3.5 × 0.8–2.5 cm, 3-parted, lobed or undivided, abaxially glaucous, both surfaces glabrous, sharply serrate, apex mucronate. Upper leaves reduced, 3-lobed, petioles wholly sheathing, tomentose. Synflorescence branched; umbels 1–4 cm; peduncles tomentose; bracts 1–3 or absent, linear, 3–4 × 0.5–1 mm; rays 6–8, unequal, 0.5–2 cm; bracteoles 4–6, linear, longer than flowers; umbellules ca. 10-flowered. Calyx teeth conspicuous subulate. Petals white. Fruit ovate-orbicular or oblong, ca. 3 × 1.2 mm, tomentose; vittae 2–3 in each furrow, 2–4 on commissure. Fl. and fr. Aug–Nov. n = 11*.
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