21 October 2014.
Iowa, United States
Locality: Pilot Knob State Park, SW 1/4 of SW 1/4 of NE 1/4 of Section 4, T97N, R23W, Ellington Township, just east of Forest City, Hancock County.
Coordinates: 43.2493, -93.5663
(Map it)
Elevation: 400m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Floating bog. Growing in association with Asclepias incarnata, Carex lacustris, Salix, Spiraea alba, and Typha latifolia.
Number of plants sampled: 50
Collector(s):