CRYPTOGAMIA— FILICES. Cystea. 301 



3. C. angustata. Deep-cut Mountain Bladder-fern. 



Frond oblong, doubly pinnate; leaflets lanceolate, decur- 

 rent, wavy, or pinnatifid, with linear, acute, partly 

 cloven, segments. Masses scattered, permanently dis- 

 tinct. 



Polypodium fragile angustatum. Hoffm. in Rceni. and Ust, Mag. 



fasc. 9. 1 l.Xl4.d. 

 P. tenue. Hofm. Germ. v. 2. 9. 

 P. ihseticum. Dicks. H. Sice. fasc. 1.17. ffWi. 780. Bolt. Fil. SO. 



t.4D. 



P. polymorphum A, rhseticum. Millars Dauph. v. 3. 846. t. 53./. A. 



From the author, agreeing precisely with Mr. Dickson s sped- 



mens. 

 P. ilvense. Raii Syn. 1 17. 

 Cyathea fragilis /3. Fl. Br. 1 139 ; omitting the references to Ray 



and Fliikenet, which belong to Aspidium dumetonim. 

 C. fragilis y. FL. Br. 1139. 

 Aspidium fragile /3. Willd. Sp. PI. v. 5. 281 j omitting the syn. of 



Ray and Flukenet. 

 A. rhaeticuni. mild. Sp. PL v. 5.280 ; omitting the reference to 



Linnwus, and perhaps Swartz. 

 Filix pumila saxatilis altera. Clus. Hist. v. 2. 212./. Pann. 706. f. 

 Filicula petraea mas. Ger. Em. 1 142./ 

 F. funtana major, sive Adiantum album filicis folio. Bauh. Pin. 



358 3 according to the opinion of Linncvus. 



In mountainous woods, or about shady rocks, on the loftiest hills 

 of Scotland, Wales, and the north of England. 



On shady rocks in Scotland. F)ickson. Near Llanberis, North 

 Wales. Mr. Lhwyd. Brought from Gordale in Craven, by the 

 late Mr. Curtis, whose specimen, rightly named, is in my pos- 

 session. 



Perennial. June, July. 



Root tufted, or somewhat creeping, black, with long fibres, and 

 rusty scales. Fronds several, erect, twelve or tiftcen inches 

 high, of which the slender, blackish, smooth and naked .^talk 

 occupies more than one-third, sometimes nearly half; tlie mid- 

 rib above is still more slender, and, like every other part, quite 

 smooth, without any membranous border. Main wings, or 

 leaves, bright green, from twelve to fifteen pair, of a moderate 

 length, nearly o|)posite, taper-pointed ; the lowermost rather 

 shorter, and more remote from the next, than those about the 

 middle of each frond ; all i)innate, with a scarcely bordered mid- 

 rib. Lea/lets about ten at each side, alternate, lanceolate, 

 decurrent, rather bluntly pointed, sometimes tapering at the 

 extremity; alt either deeply pinnatifid, with oblong, acute, 

 wavy segments ; or, in less luxuriant |)lants. slightly j)innatifid, 



