CRYPTOGRAMMA. 39 



margin. Rare. Probably towards the 

 North. Tender and pretty. 



DICKIEANA. From 4 to 6 inches. 



The simplest of the family. Pinnse oppo- 

 site, short, obtusely-tapering; pimmlets 

 closer together, broad, rounder, and merely 

 jagged. Both overlapping their neighbour. 

 Sori marginal. Found by Dr. Dickie, in 

 a sea- cave near Aberdeen. 



MONTANA. (Mountain Bladder Fern.} 



From 4 to 8 inches. Root creeping. 

 Growing in masses. Frond triangular. 

 Pinnse on the upper third only of the stem, 

 and mainly alternate ; the lowest being 

 much the largest, and having secondary 

 ones on their inferior side ; that next the 

 stem the greatest, and at some distance 

 from it, and becoming nearer sized with 

 that above on each primary pinna upwards 

 gradually. Texture very thin and frail. 

 Sori scattered. Extremely rare. Only in 

 a few places in Scotland. Very elegant. 



CRYPTOGRAMMA. 



Sori circular beneath the recurved margin of 

 the pinnule. No Indusium. 



CRYPTOGRAMMA CRTSPA. (Rock-brake or Parsley 

 Fern] Fig. 24. Fertile fronds from 3 to 



