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.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.