Plate No. 7. 



1, 2 m Woodsia oregana; 1 - 

 division, X 1. 3, 4 = Woodsia 

 primary leaf-division, XI. 5, 6 

 6 - a primary leaf-division, X 1. 



a I f, X l A\ 2 = a 

 scop u Una: 3 = a leaf, 

 = Cystopteris fragilis; 5 



primary leaf- 

 X H: 4 » a 

 = a leaf, X Hi 



105 



