Stout, to 1.5 m, glabrous below and at base of the rays, usually scaberulous below the umbellets; lower lvs 1–3 dm, the upper much reduced, with broad sheathing petioles; lfls lanceolate to oblong, 3–8 cm, acuminate, coarsely toothed, the margin minutely ciliate and not differentiated; umbels 6–15 cm wide; rays 13–25, the outer spreading but not decurved; fr oblong-elliptic, 4–7 mm, cordate at base, glabrous, the lateral ribs prominently winged; oil-tubes few; seed adherent to the pericarp; 2n=22. Mt. woods; Pa. to N.C. and Tenn. July–Sept. (A. curtisii)
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