Callitriche palustris L.
Common Name: WATER-STARWORT
Synonym: Callitriche verna
Coefficient of Conservatism: 6
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

C. verna of Michigan Flora.

In muddy or sandy substrates in shallow water of lakes, ponds, streams, river margins, swamps, ditches, and (often) puddles in old trail roads; often in cold spring-fed waters, ± terrestrial on recently exposed shores and banks.

Since fruits start ripening fairly early in the season, most collections have some fruits far enough advanced to demonstrate the characteristic narrow wings at the apex, as well as the more elongate shape compared to the fruit of C. heterophylla.

Locations

Alger County
Baraga County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Delta County
Dickinson County
Emmet County
Gogebic County
Gratiot County
Houghton County
Iosco County
Iron County
Keweenaw County
    Including Isle Royale
Luce County
Mackinac County
Macomb County
Marquette County
Missaukee County
Oceana County
Ontonagon County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
Van Buren County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 14, 2017. http://michiganflora.net/species.aspx?id=1932.