Elodea canadensis Michx.
Common Name: COMMON WATERWEED
Coefficient of Conservatism: 1
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Elodea canadensis flower G. E. Crow flower

In waters of almost every kind and depth, including the Great Lakes. Recorded up to 8.2 m deep in Michigan, and up to 14 m elsewhere.

Staminate plants are much less common than pistillate, and may resemble E. nuttallii vegetatively. The spathe elongates considerably as it matures; on fresh flowering material from Emmet Co. it has been seen as long as 14 mm when the flower is exserted on its long stalk. On pistillate plants there is a tendency for the leaves to be broad, crowded, ascending, and strongly imbricate on short branches. Forms with internodes longer than the length of the leaves may occur in deep water, but the large leaves and stout stem will readily distinguish such plants from the delicate E. nuttallii.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Clare County
Crawford County
Delta County
Dickinson County
Emmet County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Ingham County
Iosco County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Luce County
Mackinac County
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Missaukee County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
St. Joseph 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 18, 2017. http://michiganflora.net/species.aspx?id=1447.