104 STUDY OF COMMON PLANTS. 



who are likely to use this book their study has not been 

 introduced. The various text-books and manuals give the 

 necessary help for beginning their study. 1 



1 No provision is made in this work for the study of fungi, not because 

 they are unimportant, but because it is better on the whole that the 

 student should complete his preparatory course with the definite under- 

 standing that he knows nothing whatever about this vast and hetero- 

 geneous group. 



