Cicuta maculata L.
Common Name: WATER HEMLOCK
Coefficient of Conservatism: 4
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt B-Forb

Marshes and shores, swamps, moist to wet forests and thickets, stream banks, meadows, ditches.

Usually considered to be the most violently poisonous plant in temperate North America, for both livestock and humans. Poison is concentrated in the clustered tuberous roots, although all parts of the plant are poisonous. Symptoms appear promptly and include abdominal pain, violent convulsions, fever, paralysis, and respiratory failure, followed by death, sometimes within 15 minutes, or as long as 8 hours later.

Locations

Allegan County
Alpena County
Arenac County
Barry County
Berrien County
Branch County
Calhoun County
Charlevoix County
Cheboygan County
Chippewa County
    Only on Drummond Island
Clare County
Clinton County
Crawford County
Delta County
Emmet County
Genesee County
Grand Traverse County
Gratiot County
Hillsdale County
Ingham County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Lake County
Lapeer County
Lenawee County
Livingston County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Mason County
Menominee County
Midland County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Ottawa County
Presque Isle County
Saginaw County
Sanilac County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://www.michiganflora.net/species.aspx?id=114.