HOW TO USE THE BOOK 



both a fertile and a sterile frond. In carrying them 

 home you will remember the necessity of keeping 

 together the fronds which belong to the same plant. 



When sorting your finds you will group them ac- 

 cording to the Guide. The broad-leaved Sensitive 

 Fern, with its separate, dark-green fruit cluster, 

 makes its way necessarily to Group I. To Group 

 II goes your pale-fronded Royal Fern, tipped with 

 brown sporangia. As a matter of course you lay 

 in Group III the leaf-like but dissimilar sterile and 

 fertile fronds of the Slender Cliff Brake. The 

 spreading Brake, its reflexed margin covering the 

 sporangia, identifies itself with Group IV. The ob- 

 long fruit-dots of the little Mountain Spleenwort 

 carry it to Group V, while the round ones, like pin- 

 heads, of the Evergreen Wood Fern announce it a 

 member of Group VI. 



The different ferns sorted, it will be a simple mat- 

 ter to run quickly through the brief descriptions 

 under the different Groups till you are referred to 

 the descriptions in the body of the book of the 

 species under investigation. 



