Locality:
United States, Wisconsin, Sauk, Eastern portion of Durst Rockshelter (TNC) Property, ca. 300 m N of Hemlock Road and ca. 500 m W of Reich Drive
Occurrence Remarks:
Species was previously collected at site by Harriman (KH27) on 5 May 2000 (specimen in the UW-Madison teaching herbarium). Seemingly not common.