For Triticum
Morrison, L.A. 2007. Triticum. 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
Zohary, D., and M. Hopf. 1994. Domestication of plants in the Old World. The origin and spread of cultivated plants in west Asia, Europe, and the Nile Valley. Second edition. Clarendon Press, Oxford. 279 pp. Google Scholar