PKEFACE 3 



The figures referred to are to be found in the text of this 

 Key, unless the reference is preceded by/, or e. The former 

 refers to Bergen's Foundations of Botany, the latter to his 

 Elements of Botany. 



The pronunciation is indicated by accent marks and the 

 division of the accented syllable. A vowel ending this 

 syllable has a long sound; but when the accented syllable 

 ends in a consonant, the vowel has a short sound. It 

 matters little whether the English or Continental sounds 

 for the vowels are used ; the former are more generally 

 authorized, though the latter are becoming more and more 

 prevalent. 



In this revised edition I am indebted to Prof. C. V. Piper, 

 of the Agricultural College, at Pullman, Washington, for 

 additions to the Flora from Washington and Oregon, and 

 to Mr. Louis A. Greata, of Los Angeles, for additions from 

 the country adjacent to Los Angeles. 



ALICE EASTWOOD 



ACADEMY OF SCIENCES 



SAN FRANCISCO 



