Barr, C.A. 1983. Jewels of the Plains. Minneapolis: University of Minnesota Press.
Great Plains Flora Association. 1986. Flora of the Great Plains. Lawrence: University Press of Kansas.
Johnson, J.R. and J.T. Nichols. 1970. Plants of South Dakota Grasslands. Ag. Exper. Sta. Bulletin 566. Brookings: South Dakota State University.
Kindscher, K. 1992. Medicinal Wild Plants of the Prairie. Lawrence: University Press of Kansas.
Nebraska Department of Agriculture. 1979. Nebraska Weeds. Lincoln: State of Nebraska, Weed Division.
Phillips Petroleum Company. 1955. Pasture and Range Plants (a series of six sections).
Salac, S.S. 1977. Collection, Propagation, Culture, Evaluation, and Maintenance of Plant Materials for Highway Improvement. Nebraska Department of Roads. Research Study 64-62.
Stubbendieck, J., S.L. Hatch and K.J. Kjar. 1982. North American Range Plants, 2d ed. Lincoln, Nebraska: Univiversity of Nebraska Press.