1918] The Grasses of Illinois 263 



lots ill the same genus have been drawn, in nearly all cases, to the 

 same scale ; hence their relative size will be apparent from the figures. 



The genera are arranged as in Gray's Manual, but the species 

 under each genus are arranged alphabetically. The nomenclature fol- 

 lows the American code. 



The bibliography includes only those works in which the grasses 

 of the state are mentioned. For general information on grasses the 

 reader is referred to "A Text-book of Grasses" by A. S. Hitchcock 

 (Macmillan, 1914), which also contains an excellent bibliography. A 

 recent publication of the'Ncbraska Experiment Station, ' ' A Handbook 

 of Nebraska Grasses," Bulletin 148, also contains a very complete 

 bibliography. 



The discussion of each species contains references to the articles 

 or books cited in the bibliography. Thus, under S'orgJiastrum nutans 

 (page 280), are given the synonyms to which the species was referred 

 by earlier writers. " Andropogon avenaceum, Michaux '03, 58," then, 

 refers us to "Flora Boreali-Americana, " page 58, where this species 

 was listed as Ayxdropogon avenaceum. 



