IV PREFACE. 



ones, only such changes being made as seemed necessary 

 either on account of uniformity or to bring out unob- 

 served characters. PubHshed Hsts of our local flora 

 have also been constantly consulted, but it is only jus- 

 tice to the author to say that he has personally collected 

 nearly all the plants included in this work and has 

 added many species not heretofore reported from our 

 region. Duplicates of these specimens, as well as many 

 others from southern California, are to be found in the 

 Leland Stanford Jr. University Herbarium. 



The author wishes to express his thanks to the follow- 

 ing persons for assistance in various ways: Mr. S. B. 

 Parish, Dr. A. Davidson and Dr. H. E. Hasse for valuable 

 notes; Miss Alice Eastwood for the privilege of examin- 

 ing the material in the California Academy of Sciences 

 Herbarium; Dr. N. L. Britton, Dr. B. L. Robinson, Dr. 

 E. L. Greene, Dr. P. A. Rydberg and Dr. J. K. Small for 

 notes on doubtful forms; finally to Prof. William R. 

 Dudley, who has not only given many critical notes and 

 valuable suggestions which have aided greatly toward 

 the completion of the work, but has also shown many 

 personal favors which have rendered the task a pleasant 

 one to the author. 



It has been thirteen years since the above preface to 

 the first edition was written, and in that time, chiefly 

 due to the enthusiasm of a few local botanists, notably 

 S. B. Parish, Dr. A. Davidson, Professor C. F. Baker, 

 Ernest Braunton, George L. Moxley, Helen D. Gies, 

 Fordyce Grinnell, I. M. Johnston and the late Dr. H. E. 

 Hasse, a number of additional species have been recorded. 

 Many of these were included in the "supplemented 

 edition" published in 191 1. 



In order that the present edition may be more con- 

 venient and thereby further facilitate the study of the 

 local flora, it is brought out in pocket size. And for the 

 same reason keys to the species are added. 



