Glab. herb with creeping, branching stems, rooting at nodes, forming open patches up to ± 3 dm. diam. Lvs tufted at nodes on slender petioles 5-10-(15) cm. long. Lamina rather pale green, subcoriac., 2-4 cm. diam., deeply 3-partite to 3-foliolate. Lflts or divisions obcuneate, irregularly lobulate to crenulate towards apex; margins slightly thickened and recurved. Peduncles very slender, occ. branched, ± 10 cm. long. Umbels ± 15 mm. diam.; fls 8-12 on capillary unequal pedicels 5-10 mm. long. Involucral bracts linear, acute to acuminate. Fr. ± 2.5 mm. long, tetragonous, deeply furrowed at commissure. Mericarps distinctly to obscurely 5-ribbed.

2n = 32