122 Annals of the Carnegie Museum. 



* F. nutans Willdenow. Nodding fescue-grass. 



f F. elatior Linnaeus. Tall fescue-grass, 



BROMUS Linn^us. 



* B. secalinus Linnaeus. Upright chess, cheat. 



f B. racemosus Linnaeus. Wood chess. 



f B. ciliatus Linnaeus. Rye chess. 



LOLIUM Linnaeus. 

 f L. perenne Linnaeus. Rye-grass. 



AGROPYRON J. Gartner. 



* A. repens (Linnaeus). Couch-grass. 



TRITICUM Linn^us. 



* T. vulgare Linnaeus. Wheat. 



Frequently spontaneous along railroad tracks. 



SECALE Linnaeus. 



* S. cereale Linnaeus. Rye. 



Spontaneous in waste places, occasionally. 



HORDEUM Linnaeus. 



* H. vulgare Linnaeus. Common barley. 



Along railroad tracks. 



ELYMUS Linnaeus. 



* E. Virginicus Linnaeus. Virginia wild rye. 



* E. Canadensis Linnaeus. Nodding wild rye. 



