17 July 2005.
Iowa, United States
Locality: Adjacent to the Boone River on the south side, Tunnel Mill Wildlife Management Area, Hamilton County
Coordinates: 42.3497, -93.8578
(Map it)
Elevation: 295m.
Georeference protocol: Lat/lon determined by GPS
Habitat: Wild Habitat
Environment description: Partial shade. 40% slope with a northern aspect
Number of plants sampled: 17
Associated species: Quercus spp., Carya sp. and Toxicodendron radicans
Comment: Rare population, with irregular distribution. Population of approximately 17 plants.
Collector(s):