United States, Minnesota, Washington, Washington County ...On the Mississippi River, about one mile south of St. Paul Park. NW1/4 SW1/4 section 13, T 27N R 22W. 027N 22W 13
44.8252778 -93.0016667
44° 49' 31" N,93° 00' 06" W;Collector
in quiet backwater
Occasional. Mixed with Wolffia columbiana. [annotator note: mixed with Lemna turionifera, Wolffia columbiana, and Spirodela polyrrhiza]