Several specific collections are included in the gardens surrounding the
Mari Sandoz High Plains Heritage Center.
The Sandhills Collection, at the feet of the Mari Sandoz bronze figure, “Mari’s Prairie,” includes many grasses and wildflowers. Many of the grasses and wildflowers growing here were collected with permission from the hills within sight of Mari's grave in Sheridan County. The collection serves as a teaching tool for students of Sandoz' works and Chadron State College's botany and range management classes.