Azolla caroliniana Willd.
Common Name: WATER FERN
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt Fern

Azolla caroliniana G. E. Crow

Floating on still water of ponds and river backwaters in southernmost Michigan; rare and seemingly transient in appearance from year to year.

Poorly known in Michigan and, although native to eastern North America, the first collection being as recent as 1993 makes it uncertain that it should be considered native to Michigan. However, it is admittedly very easy to overlook. 

Locations

Berrien County
Macomb County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 28, 2021. https://michiganflora.net/species.aspx?id=533.