Stems slender, up to 3 dm. long, branched, creeping, rooting at nodes, ascending at tips (sts suberect or scrambling), ± pilose. Lvs on slender retrorsely pilose petioles 1-5-(8) cm. long. Lamina (5)-10-30-(40) mm. diam., ± obscurely 5-9-lobed; lobes shallow, obscurely crenately (occ. subdentately) toothed, member. to subcoriac., pilose to nearly glab.; sinus narrow to broad. Umbels (2)-5-(12)-fld, forming heads up to c. 7 mm. diam., on peduncles 1-3-(6) cm. long. Fls subsessile. Fr. ± 2-3 mm. diam., ± flattened, glab., pale to whitish brown. Mericarps rounded on back (rarely acute); facial rib indistinct to evident.

2n = 132

n = 24

Perennial, forming large patches; stems stout or slender. Lvs simple, glabrous to densely hairy above and below, dull green, greenish brown or bright glossy green, 5-35 mm diam., divided to ⅕-⅓ of radius into 5-7 segments; segments triangular to broadly oblong-obovate, each again sometimes obscurely 3-lobed and toothed; teeth crenate or serrate, sometimes with short hair tips; margins flat; petiole with a few retrorse hairs near blade to densely hairy. Umbels simple, 5-many-flowered; peduncle < or ± = lvs. Fls subsessile or shortly pedicellate. Fr. glabrous, (1.8)-2-3.5 × 1.8-2.5 mm, usually rounded on dorsal edge; ribs usually slightly engraved into surface of mature fr., rarely slightly raised.