Utricularia resupinata B. D. Greene
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Utricularia resupinata A. A. Reznicek

Flowering in shallow water and on wet or recently exposed sandy, peaty, or marly shores of lakes and ponds.

This species may form extensive vegetative mats in deeper water. Usually (but not always) blooms when water levels are low and temperatures are high. Sometimes forms pink carpets or bands at the sandy-peaty edges or bottoms of a small receding lake.

May grow with U. cornuta around the edges of softwater lakes, and in years of higher water both exist as carpets of dense leaves and stems, buried except for the dark green tips of leaves that rise above the substrate. Fragments of such vegetative mats often break loose and drift about. Young leaves can be distinguished from those of other small bottom-living aquatics by their inrolled tips. Mature leaves may be as long as 7.5 cm. Apparently U. resupinata rather consistently bears two rootlet-like branches from the horizontal stem at each leaf-bearing node, while in U. cornuta the leaf-bearing nodes produce 0–4 branches.


Alger County
Allegan County
Cass County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
Clare County
Emmet County
Gogebic County
Houghton County
Ingham County
Ionia County
Iron County
Kalamazoo County
Kent County
Lake County
Luce County
Montcalm County
Muskegon County
Newaygo County
Oceana County
Ontonagon County
Otsego County
Schoolcraft County
St. Clair County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 27, 2022. https://michiganflora.net/species.aspx?id=1621.