In Ky. this northern (circumboreal) species of base-rich wetlands is known only from the following colls.: C.W. Short (PH), ca. 1840, "Beard's Branch near Lexington [FAYE]; and C.E. Mueller (KY), June 1883, Louisville [JEFF, but perhaps cultivated]. There was also an unverifiable listing for the Louisville (JEFF) area by McMurtrie (1819). The species has been found recently by D. Boone (pers. comm.) at a seep in Indian Hill, Hamilton Co., Ohio, within 5 miles of Ky.