Four thousand dried, mounted specimens, mainly from Minnesota and Illinois, including wetland collections from Cedar Creek Natural History Area (University of Minnesota), Boundary Waters Canoe Area Wilderness (Jitterbug Lake, post blowdown, pre-fire), Glacial Park (McHenry County, IL), Loyola University Retreat and Ecology Campus (McHenry County, IL), as well as student contributions – emphasis on wetland plants, vascular plants