Ceratophyllum demersum L.
Common Name: COONTAIL
Coefficient of Conservatism: 1
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Submersed in very shallow to deep (5.5 m) water of ponds and lakes and quiet backwaters of streams and rivers.

A common species, typically with teeth along the margins of the ultimate segments of the leaves just visible to the naked eye, expanded and green basally (shaped like a rose prickle) and tipped with a pale spinule usually no longer than the green portion. Sometimes, especially on lateral branches and new growth, the leaves may be limper and less conspicuously toothed, and such specimens may resemble C. echinatum.

Locations

Alger County
Allegan County
Baraga County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Clare County
Clinton County
Emmet County
Genesee County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Ingham County
Ionia County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Only on Isle Royale
Lapeer County
Leelanau County
Lenawee County
Livingston County
Mackinac County
Macomb County
Manistee County
Mason County
Mecosta County
Menominee County
Midland County
Missaukee County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Oakland County
Ontonagon County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
Shiawassee County
Tuscola County
Van Buren County
Washtenaw County
Wayne County
Wexford County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://www.michiganflora.net/species.aspx?id=809.