106 FIRST BOOK OF GRASSES 



are not yet covered by manuals, but manuals of ad- 

 joining regions include most of the species. 



Besides these general manuals there are: Hitch- 

 cock's Text-Book of Grasses, 1914, with illustrations, 

 treating of economic grasses and their uses and also 

 of the morphology and the classification of grasses; 

 Grasses of Iowa, Part II, by Pammel, Ball, and 

 Scribner (Iowa Geological Survey, Supplementary 

 Report, 1905), with keys, descriptions, and illustra- 

 tions; Grasses of Illinois, by Edna Mosher (Univer- 

 sity of Illinois Agricultural Experiment Station 

 Bulletin 205, 1918), with keys, descriptions, and 

 illustrations; Manual of Farm Grasses, by A. S. 

 Hitchcock, 1921. 



A helpful little bulletin is Lyman Carrier's " Iden- 

 tification of Grasses by Their Vegetative Char- 

 acters" (Bulletin 461, United States Department of 

 Agriculture, to be obtained from the Superintendent 

 of Documents, Government Printing Office, Wash- 

 ington, D. C., for 5 cents). One should always have 

 the inflorescence for accurate identification, but 

 there are occasions when one would be glad to iden- 

 tify a seedling if possible. 



One who finds interest and delight in the study of 

 grasses will want to accumulate a working library. 

 A bibliography of even the most important works 

 would be too long to be included here and would 

 be out of place in a first book of grasses. How- 

 ever, it may be well to mention a number of pa- 

 pers on grasses that have been issued in the past 



