Wickiup Hill Learning Center, Linn County, IA
Butterfly garden and trail in Monona, Iowa
Butterfly garden in Bellevue, Iowa
Neal Smith National Wildlife and Habitat Refuge, 20 miles east of Des Moines, IA
Tallgrass Prairie Center at the University of Northern Iowa, Cedar Falls; producers of a video named America's Lost Landscape: The Tallgrass Prairie. One of the sponsors of the Iowa Roadside Program dedicated to restoring the roadsides of Iowa to native prairie. This would be an excellent field trip.
Iowa Prairie Plants - maps of plant distribution by county, and of open prairie locations within the state