27 September 2006.
Iowa, United States
Locality: Department of Natural Resources public area, approximately 0.75 mile northwest of Des Moines River bridge, west of Luther, SW 1/4 of NW 1/4 of SE 1/4 of Section 29, T83N, R26W, Marcy Township, Boone County.
Coordinates: 41.9694, -93.9033
(Map it)
Elevation: 329m.
Environment description: Far west side of Des Moines River floodplain spring. Full sun. Edge of wet spring.
Associated species: Aster pilosus, Bidens, Boehmeria cylindrica, Carex, Epilobium coloratum, Eupatorium perfoliatum, Impatiens capensis, Physostegia parviflora, Salix exigua, and Scutellaria lateriflora.
Comment: Population of >30.
Collector(s):