United States, Wisconsin, Dane, Madison; Lake Wingra: Vilas Beach, muddy &/or sandy beach just E of beach house.
43.05862262 -89.41137915 +-285m.
43.05862262° N, 89.41137915° W; T07N R09E sec27 NW4NE4;
Latitude/Longitude was derived from the Township, Range, Section location. This causes an imprecision.
Sandy beach. Additional data for 28184-28187: Colony on beach (of ca. 100 plants) and that on mudflat (of ca. 1000 plants) evidently long established, at least previous to this or last year. B.) Sandy beach: dense spreading clumps with more/ess 30-40 basbal branches; assoc.: Echinochloa crus-galli, Cyperus diandrus, C. rivularis, C. strigosus, Polygonum hydropiperoides, P. lapathifolium, P. pennsylvanicum, Amaranthus tuberculosis, Scutellaria lateriflora.
[MASS COLLECTION: only 1 mounted sheet]