PREFACE 



This little volume is intended as an introduction to Colorado plants. 

 It is not the result of book study but of many summers' work in forest 

 and meadow, on alpine height and level plain. 



The first part of the book is a short essay on the plants of Colorado — ■ 

 their habits, distribution and relation to altitude. In the short compass 

 of the book it is possible to describe only a few of the flowering plants 

 of the state but the examples chosen are of the most interesting species 

 from different altitudes. 



Trees, the author believes, are the best plants to begin with in a 



study of vegetation. Hence, he has given, in addition to drawings of 



many of the species, rather full accounts of some of the more important 



ones. Keys are arranged for the determination of all native trees of 



the state. By the use of these it becomes possible to recognize with 



ease the different species met in a mountain journey or during a trip on 



the plains. 



Boulder, Colo. 

 March, 1909 



