• PREFACE 



Several years have elapsed since Part I, Bulletin I, of the 

 "Grasses of Iowa" was published. Part I, naturally, covered 

 the general, biological, chemical and feeding problems con- 

 nected with the grasses of the state. When that work was being 

 prepared it was thought possible to bring all this material 

 together into one volume. As the work progressed, however, it 

 seemed desirable to present the matter in two parts : Part I deal- 

 ing with the general biology, and Part II with the descriptive 

 and geographical study of the grasses of Iowa. After many 

 delays the work of printing Part II was begun early in January. 



I am greatly indebted to Miss Charlotte M. King for many 

 of the drawings prepared expressly for this work by her; also 

 for her help in connection with synonymy. To Mr. R. E. 

 Buchanan and Miss Estelle D. Fogel I am indebted for careful 

 proof-reading and other assistance. Mr. Buchanan and Miss 

 Fogel prepared the index, which is unusually complete. For 

 clerical assistance I am indebted to Miss Mae Combs, Miss Jen- 

 nie Wharton and Miss Helen Dickerson. To Mr. T. E. Savage 

 I am greatly indebted for his unfailing kindness in looking after 

 the many details of arrangement of subject-matter. I wish, 

 also, to express my thanks to the many friends who have assisted 

 by their contributions of grass material from all parts of the 

 state for use in determining distribution. 



The descriptions for the most part are furnished by the staff 

 in the Division of Agrostology of the U. S. Department of Agri- 

 culture: E. D. Merrill, C. R. Ball, F. Lamson-Scribner, C. L. 

 Shear, J. Smith and T. H. Kearney. Mr. Carleton R. Ball is 

 responsible for the diagnostic keys. Professor Spillman, of the 

 Bureau of Plant Industry, gave his consent to this use of descrip- 

 tions furnished by the Division of Agrostology. 



L. H. PAMMEL. 

 Ames, Iowa, Jan. 15, 1905. 



Issued April 1, 1905. 



