Many sites are protected and maintained by government bodies or non-profit organizations such as The Nature Conservancy, the Wisconsin and Minnesota Departments of Natural Resources, and the Iowa Natural Heritage Foundation.
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Examples include the Neal Smith Wildlife Refuge near Prairie City, Iowa, the Indiana Dunes National Lakeshore in Indiana, numerous State Natural Areas in Wisconsin, the Cook County Forest Preserve District in Illinois, the Oak Openings Preserve Metropark in Ohio, and Pinery Provincial Park on Lake Huron in Ontario.
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It is listed as an endangered species in Vermont and New Hampshire, as well as in Ontario, where there are only two remaining populations located within a single stretch of oak savanna in Burlington.