Glab. or nearly so, forming patches ± 2 dm. diam.; stems almost filiform. Lvs on petioles ± 3-5 cm. long; lamina fleshy when fresh, (4)-5-10-(15) mm. diam.; lflts 3, almost sessile, ± 3-4 mm. long, obovate, cuneately narrowed to base, (2)-3-(5)-crenately toothed to entire. Umbels 2-6-(8)-fld on slender peduncles 1-3 cm. long. Fls c. 1-1·5 mm. long, subsessile. Fr. somewhat turgid, glab., us. very pale brown, c. 1-2 mm. diam. Mericarps obtuse on dorsal edge, each face with 1 very obscure rib.

Rhizomatous and stoloniferous perennial herb; stems glabrous, slender. Leaves 3-foliolate; leaflets sessile, shiny green, glabrous to sparsely pilose above, usually moderately pilose below (rarely glabrous), broadly obovate-cuneate, 2-6 mm long, with 1-3 lobes, and each lobe with 1-4 shallow dentate teeth, teeth with a small cartilaginous point; petiole slender, (3-) 10-30 (-50) mm long, always with a few retrorse hairs near blade, otherwise glabrous; stipules scale-like. Umbels simple (1-) 2- 10 (-12)-flowered; bracts scale-like, free or shortly fused at base, c. 0.5 mm long; flowers hermaphrodite, subsessile, c. 1-2 mm diam. Fruit brown, 0.8- 1.2 × 0.8-1.2, acute on dorsal edge; ribs raised, slender, prominent.

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