In June 1983 two large patches of Fringed Polygala were found in the Cedar-Tamarack woods at the north end of Cedarburg Bog. These patches had obviously been established for a number of years but the species had never previously been noticed in the bog. These Ozaukee County populations are southern disjuncts separated by at least 60 miles from the main part of the species' distribution.
Reinartz, J.A. 1983. Notes on two species of plants at the margins of their ranges in Cedarburg Bog. Field Station Bulletin 16(2): 27-28.