Plant us. hispid to pilose, forming patches up to c. 3 dm. diam. Lvs on petioles up to ± 5 cm. long, clad in patent to retrorse hairs; lamina firm, (2)-5-10-20-(40) mm. diam., distinctly 5-7-lobed; basal sinus narrow to open; lobes us. again lobulate, sharply toothed (teeth rarely obscure), sinus narrow. Umbels (5)-10-20-(40)-fld, on peduncles 1-2-(4) cm. long. Fls sessile or nearly so. Frs red-brown, crowded into heads 2-5 mm. diam.; mericarps acute on dorsal margin, with 1 acute rib on each face.

2n = c. 36

n = 24

2n = 48

n = 24

2n = 48

Perennial, forming large patches; stems slender. Lvs simple, usually dull green, often with a reddish margin, moderately to densely hairy above and below or moderately hairy above only, 5-20-(25) mm diam., divided to 1/4-?-(1/2) of radius into 5-7 segments; segments broadly obovate, each again usually 3-lobed and serrate; teeth with blunt or sharp cartilaginous points; margins flat; petiole ± glabrous or moderately to densely hairy. Umbels simple, with numerous fls; peduncles = or somewhat < lvs. Fls subsessile. Fr. glabrous, 1.3-1.5 × 1-1.3 mm, acute on dorsal edge; ribs raised, slender.