Plant 20–50 cm high. Rootstock short and thin, roots fibrous. Stem erect. Basal leaves numerous; petioles 20–28 cm, purplish tinged, sheaths scarious-margined; blade suborbicular or broadly-ovate, palmately 3-parted, 5–10 × 5–9 cm, shallowly dentate, teeth spinulose; central segment long-elliptic or obovate-elliptic, base cuneate, apex acute, 5–10 × 2.5–3.5 cm; lateral segments oblique-elliptic. Inflorescence cymose branched, peduncles elongate; bracts 5 or 6, small, 1–1.5 × ca. 0.5 mm; rays 5–11, subequal, 2.6–6 mm; bracteoles 5, linear, 0.5–1 mm; umbellules 5–6-flowered. Staminate flowers 4 or 5 per umbellule, pedicels ca. 2 mm. Fertile flower 1 per umbellule, calyx teeth linear, ca. 0.8 mm; styles 3.5–4-times longer than the calyx teeth. Fruit ellipsoid, 2–2.5 × 1–1.7 mm, bristles in regular rows in furrows, ribs glabrous, stout and prominent; vittae 1 under each rib, 2 on commissure. Fl. and fr. Apr–Sep.
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