06 August 2009.
Illinois, United States
Locality: Southwest edge of Pierce Lake, Rock Cut State Park, SW 1/4 of SE 1/4 of Section 27, T45N, R2E, Caledonia Quad, Rockford, Winnebago County.
Coordinates: 42.3433, -88.9864
(Map it)
Elevation: 259m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Rich woods.
Number of plants sampled: 32
Associated species: Acer saccharum, Arisaema triphyllum, Asarum canadense, Campanula americana, Fraxinus americana, Juglans nigra, Lonicera maackii, Quercus alba, Staphylea trifolia, and Tilia americana.
Comment: Harvested approximately 20 seeds from 13 plants and 5 seeds or less from an additional 12 plants.
Collector(s):