United States, Michigan, Kent, Oakfield Twp., Flat Iron Lake, ca. 9 miles directly east of Rockford.
43.1238 -85.3843
In open water zone near margins of lake dominated by rooted floating-leaved and submersed aquatic plants. Water mostly 1-3 m deep. Submersed, growing in water ca. 2-4 m deep.
sheet - 1
Very abundant locally. Inflorescences slightly emergent above water surface. Protogynous.