Stout, freely branched, to 15 dm; lower lvs 3–4 times ternately compound, the upper less so and the uppermost sometimes simple; lfls thin, lanceolate to oblong or ovate, 3–8 cm, acute or acuminate, sharply serrate, broadly acute to rounded at base; terminal umbels often doubly compound, the primary rays to 2 dm, the secondary 2–5 cm, the pedicels 2–4 mm; fr elliptic, 5–7 mm, half to two-thirds as wide, the ribs narrowly winged; 2n=22. Woods, chiefly in the mts.; Pa. and Ky. to Ga. and Ala.; s. Mo. and Ark. June, July.