IV PREFACE TO THE TRANSLATION. 



general readers, an introduction wherein is illustrated 

 the manner of using the keys of analysis in determining 

 genera is given, and a full glossary and index are added. 

 It is hoped also that the translation will thus be made 

 more suitable for use as a text-book in our Agricultural 

 Colleges, for which purpose the treatment of the struc- 

 ture, morphology, and physiology of grasses, given in 

 detail and fully illustrated in Part I, renders the work 

 especially well adapted. 



Those familiar with the German will notice that in 

 translation occasional liberties have been taken with the 

 original by the omission of unimportant matter, inser- 

 tion of head-lines, etc. Except in the account of the 

 Bambusese, all matter enclosed in brackets has been 

 added by myself. A number of notes and observations 

 have been added by Prof. Hackel, to whom the manu- 

 script was submitted for revision and approval before 

 being sent to the printers. 



Following the number of each genus there has been 

 inserted, in parenthesis, its number in Bentham and 

 Hooker's Genera Plantarum, facilitating reference to 

 that work and at the same time showing the diversity 

 between the systems of classification adopted. 



With few exceptions the illustrations are from electro- 

 types of the original woodcuts obtained from the Ger- 

 man publisher, Wilhelm Engelmann, of Leipzig. The 

 figures illustrating the spikes of the cereals were redrawn 

 from the imprints in the original and reduced nearly one 

 half by photo-engraving. Figures 3a and 91a are addi- 

 tions, while figures 45a, 75a, and 78 were drawn especially 

 for the translation and appear here for the first time. 



Thanks are due Mr. Charles E. Smith, of Phila- 

 delphia, for his kind assistance with the proofs, and 

 Dr. W, J. Beal, of Lansing, Michigan, and Mr. C. M. 

 McClung, of Knoxville, Tennessee, for their interest in 

 the progress of the work and material aid in its publica- 

 tion. 



F. Lamson-Sckibnee. 



University of Tennessee, 

 Knoxville, Feb. 1. 1890. 



