The Anderson County Prairie Preserve, also know as the Welda Prairie, is 1450 acres of land purchased by the Nature Conservancy and transferred to the Kansas Biological Survey in 2006. It takes up the majority of the land between Missouri Road and Highway 59, bounded by 1100 Road in the North and 1000 Road in the South. It is used to monitor the populations of many species that use the vanishing prairie land as their home. The Preserve contains one of the few known reproducing populations of Mead’s milkweed on Earth. Mead’s milkweed is a small green-flowered milkweed that is a federally threatened plant found in eastern Kansas and in Missouri.