15 September 2003.
Iowa, United States
Locality: Picnic area, Backbone State Park, Strawberry Point, T90N R6W, NE 1/4 of NE 1/4 of SW 1/4, Section 4, Strawberry Point Quad, Delaware County.
Coordinates: 42.6361, -91.5578
(Map it)
Elevation: 321m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Mowed picnic area in open woodland. Flat slope. Alluvial, sandy loam soil with some stoniness, good drainage.
Number of plants sampled: 1
Associated species: Quercus alba and Ulmus rubra.
Comment: Occasional population abundance. ~6 plants found.
Collector(s):