169 



Fronds simple, pinnatifid or pinnate. Veins 

 copiously anastomosing with free included 

 vcisfets. 



I. Fronds simple. 



(a) Main veins not distinct to the edge. 

 (*) Under-surface naked. 



1. Fronds 6-12 inches long, J-f 



inch broad. Texture coriace- 

 ous. Sori never sunk in a cyst. 



1. P. linear is* 



2. Fronds larger, up to two feet long 



by 1-2 inches broad. Texture 

 thinner. Sori deeply sunk in a 

 cyst. 



2. P. simplex. 



(ii] Under-surface clothed with small 

 peltate scales. 



3. P. lanceolata^ 



(b) Main veins distinct to the edge or 

 nearly to the edge. 



(i) Texture thin, membranaceous. 

 Venation distinct, prominent. 



4. P, mctnbranacca^ 



