100 FERNS OF THE LAKE COUNTRY 



lobes into which the margin is cut, these veins again 

 branching into two or more venules according to the 

 size of the lobe, and each branch generally bearing a 

 sorus at about midway of its length. The sori are 

 thus generally numerous and rather irregularly placed, 

 often becoming confluent and covering the whole 

 under-surface ; but their number, and confluence, vary- 

 ing much, depending upon the various circumstances 

 of growth. The sori are nearly circular ; the flask or 

 bladder shaped (like a hood over them) indusia become 

 in age torn or split at the point into narrow segments, 

 turned back, jagged and fringe-like, the whole being 

 pushed off by the ripening spores. 



HABITATS. Borrowdale (Miss Wright and G. B. 

 Wollaston), Whitbarrow (Wollastori), Egremont (Eol- 

 sori), Ullswater (Wollaston), Arnside Knott (H. D. 

 Oeldart), Fairfield, Kendal, Windermere (Clowes), 

 Kentmere (Clowes), &c. 



angiistata, Whitbarrow, F. Clowes ; Arnside, J. Crossfield ; 



Sizergh, J. M. Barnes. 

 dentata, Kentmere, F. Clowes ; Arnside, J. Crossfield ; Kendal 



Fell, J. M. Barnes. 

 interrupta, Windermere, J. Huddart. 



