All plant images and text are ©2001-2009 Gary Fewless. The Wisconsin distribution maps were produced by the UW-Madison Herbarium and are based on the voucher specimens held by the following herbaria: UW-Madison (WIS), UW-Green Bay, UW-Stevens Point, and UW-Superior; Milwaukee Public Museum (MIL); Fort McCoy; Illinois Natural History Survey; SE Wisconsin Regional Planning Commission; WIS-DNR; Morton Arboretum (MOR); and various other Wisconsin collections. The distributions shown are based primarily on locations for which a herbarium voucher is known. Therefore they represent our current state of knowledge, but the true distributions may be somewhat different. It is likely that current and future botanists will improve the record of distributions.