15 September 2006.
Iowa, United States
Locality: 100 yards northeast of sewage treatment plant, McHose Park, Boone, NE 1/4 of NW 1/4 of SW 1/4 of Section 33, T84N, R26W, Des Moines Township, Boone County.
Coordinates: 42.0422, -93.8886
(Map it)
Elevation: 344m.
Environment description: Southeast shoreline of pond and small spring on northwest corner of pond. Partial sun. Wet soil.
Associated species: Carex, Cyperus, Epilobium coloratum, Impatiens capensis, Phalaris arundinacea, and Salix.
Comment: Population of 6-8 plants.
Collector(s):