Aquatic and Wetland Vascular Plants of the Northern Great Plains
34. Apiaceae, the Parsley Family
2. Cicuta L. -- Water hemlock1. Cicuta bulbifera L. -- Bulbous water hemlock
Erect biennial or perennial 3-10 dm tall, fibrous-rooted or with a few tuberous-thickened roots; stems slender, not thickened at the base. Leaves all cauline, the blades to 15 cm long, to 10 cm wide, with linear or very narrowly lanceolate leaflets mostly 2-9 cm long, 0.5-5 mm wide, sparsely and irregularly dentate to incised or subentire, the upper leaves much reduced, with few segments or undivided, many bearing 1-few axillary, ovoid bulbils 1-3 mm long. Umbels often not produced, seldom to 5 cm wide; rays 1-2.5 cm long; bracts none or few, narrow and inconspicuous; umbellets 1-1.5 cm wide at maturity, the pedicels 2-5 mm long; bractlets several or rarely none, narrow. Fruits seldom maturing, orbicular, 1.5-2 mm in diameter, the lateral ribs separated by a constriction on the commissure. Aug--Sep. Pond margins, springs and stream banks; scattered and local, mainly in the e part; (Newf. to B.C., s to VA, IN, IA, NE and OR).
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