IN this edition of the present volume, no changes have been made 

 excepting such as may properly be called corrections of slight verbal 

 mistakes and of errors of the press. Vol. II., completing the Botany of 

 California, is published contemporaneously with the present one, and in 

 that will be found a considerable number of additions and corrections to 

 Volume I., rendered necessary by fresh discoveries made by various zealous 

 collectors in the field. 



J. D. WHITNEY. 

 CAMBRIDGE, MASS., August 17, 1880. 



... 



PREFATORY NOTE TO THE SECOND EDITION. 



