Anethum graveolens L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - To 15 dm, branched above, glabrous and ± glaucous throughout; lvs ovate in outline, the lower long-petioled, the upper less so and smaller; ultimate lf-segments 5–20 mm; umbels to 15 cm wide; rays mostly 30–40, spreading, subequal; fr 3–5 mm, half as wide; 2n=22. Native of s. Europe, escaped from cult. throughout most of the U.S. and elsewhere. July, Aug.