Cicuta maculata L.

Cicuta maculata L. Sp. PL 256. 1753
Cicutaria maculata Lam. Encyc. 2: 2. 1786.
Cicuta virosa var. maculata Coult. & Rose, Rev. N. Am. Umbell. 130. 1888.
Cicuta dakolica Greene, Leaflets 2: 237. 1912.
Cicuta argula Greene, Leaflets 2: 238. 1912.
Cicuta ampla Greene, Leaflets 2: 241. 1912.
Cicuta dakolica var. pseudovirosa Lunell, Am. Midi. Nat. 4: 486. 1916.
Cicuta dakolica var. pseudomaculata Lunell, Am. Midi. Nat. 4: 486. 1916.
Stout, from a usually erect tuberous base bearing fleshy or fleshy-tuberous roots as well as often some fibrous roots above, 6-18 dm. high; leaves ovate in general outline, excluding the petioles 1-3 dm. long, 8-26 cm. broad, 2-3-pinnate, the leaflets lanceolate, acute to acuminate, 2-12 cm. long, 5-30 mm. broad, sharply and coarsely serrate or incised; petioles 1-3 dm. long; peduncles 2-10 cm. long; involucre of a few narrow bracts, or wanting; involucel of several linear to lanceolate, acute to acuminate, scarious-margined bractlets, 2-5 mm. long, entire or denticulate, shorter than the flowers; rays unequal to subequal, 1.5-6 cm. long; pedicels 3-10 mm. long; fruit oval to orbicular, 2-4 mm. long, 2-3 mm. broad, not constricted at the commissure, the ribs low and corky, about as broad as the usually reddish-brown intervals, the lateral ribs of the two carpels closely contiguous and forming a broad flat band, and with much greater surface display than the dorsal ribs; oil-tubes moderately large; seed not very oily, not sulcate or only very shallowly so under the tubes, the face plane to concave.
Type locality: "Virginia," Kalnt.
Distribution: Prince Edward Island and Quebec to North Carolina and Tennessee, west to North Dakota and Texas (Heller 1002, Lindhcimer 615).