FILIOES. 



1059 



pointed, as in the roch Spleenivort, to 

 the larger specimens of which this plant 

 bears some resemblance. 



On rocks and old walls, spread over 

 the greater part of the globe, especially 

 in mountainous districts, extending far 

 into the Arctic regions. Dispersed over 

 all Britain, and common in the hilly dis- 

 tricts. Fr. summer and autumn. A 

 closely allied species (if really distinct), 

 from the Alps and Pyrenees, the C. al- 

 pina (Cyathea incisa, Eng. Bot. t. 163), 

 is usually included in our Floras as hav- 

 ing formerly existed on an old wall, at 

 Low Lay ton, in Essex. 



Fig. 1290. 



2. Mountain Bladderfern. Cystopteris montana, Bernh. 

 (Fig. 1291.) 



Bootstock creeping. Fronds growing 

 singly, twice or thrice pinnate, broadly 

 triangular or rhomboidal in general out- 

 line, the pinnas of the lowest pair being 

 considerably larger and more divided 

 than the others, as in the Oak Polypody, 

 which this plant much resembles. It is 

 however of a more delicate texture, only 

 6 or 8 inches or rarely a foot high, in- 

 cluding the long slender stalk ; the pinnas 

 are mostly alternate, with more divided, 

 smaller segments, and the slender indu- 

 sium over the sori is easily seen under a 

 magnifying glass when young. 



In moist, alpine situations, in north- 

 ern and Arctic Europe, and in the great 

 mountain-ranges of central and southern 

 Europe, in the mountains of north-west- 

 ern America and Kamtchatka. In Britain, only in a few localities in 

 the Highlands of Scotland. Fr. summer. 



Fig. 1291. 



