For Sorghastrum
Dávila Aranda, P.D., and S.L. Hatch. 2003. Sorghastrum. In Flora of North America Editorial Committee. 2003a. Flora of North America north of Mexico. Volume 25, Magnoliophyta: Commelinidae (in part): Poaceae, part 2. Oxford Univ. Press, New York, NY. 783 pp. Google Scholar
Hall, D.W. 1982. Sorghastrum (Poaceae) in Florida. Sida 9: 302-308. Google Scholar