Plants 25–40(–75) cm high. Rootstock short and stout, roots fascicled, fibrous, somewhat fleshy. Stem erect, branched above. Basal leaves several; petioles 6–18 cm, sheaths scarious; blade orbicular, reniform-rounded or broadly cordate, 2–3 × 3–5.5 cm, 3-parted; central segment broadly obovate, distally shallowly 3-lobed, base cuneate, apex obtuse-rounded; lateral segments rhombic-rounded or broadly obovate, 2–3-lobed; all segments abaxially pale purplish red, crenate, primary veins 5, prominent on both surfaces. Cauline leaves reniform-rounded, 3-parted, primary veins 3. Inflorescence 2–3-dichotomously branched; bracts 1–2, 3-parted, segments lanceolate, serrate; rays 0.7–2 cm; bracteoles linear; umbellules 5–7-flowered. Staminate flowers 2 or 3 per umbellule, pedicels ca. 2 mm; petals white, obovate, apex inflexed. Fertile flowers 2 or 3 per umbellule, sessile; calyx teeth narrowly lanceolate, ca. 1 mm; styles longer than the petals, recurved. Fruit ellipsoid, ca. 1.5 × 1 mm, densely covered with uncinate bristles when mature; vittae obscure. Fl. and fr. Jun.
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