University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)
UWSP052592
af567ba4-f95b-11e2-9dec-002590257708
Wolffia columbiana H.Karst.
Araceae
Balliett, Alan
s.n.
1976-09-05
United States, Wisconsin, Monroe, Lake Tomah. From the S section of the lake
T17N 18N R01W 01W sec05 32
Highly eutrophic lake. Plant collected in 30-100 cm of water. The lake bottom is composed of a layer of silt, marl, and decomposed organic matter ranging from 30-200 cm in depth, overlying fine to medium textured sand.