For Thinopyrum
Barkworth, M.E. 1997. Taxonomic and nomenclatural comments on the Triticeae in North America. Phytologia 83: 302-311. Google Scholar
Barkworth, M.E. 2007m. Thinopyrum. In Flora of North America Editorial Committee. 2007a. Flora of North America north of Mexico. Volume 24, Magnoliophyta: Commelinidae (in part): Poaceae, part 1. Oxford Univ. Press, New York, NY. 911 pp. Google Scholar
Tucker, G.C. 1996. The genera of Poöideae (Gramineae) in the southeastern United States. Harvard Papers in Botany 9: 11-90. Google Scholar