

ACOTYLEDONS. FJLICES. AspldlUW. 153 



1. Gr. Celerach, fronds pinnatifid covered with imbricating chaffy 

 scales beneath, segments all coadunate ovate obtuse, scales 

 entire. Willd. Scolopendrium Ceterach, E. B. t. 1244. As- 

 pknhim Ceterach, Ligh/f. p. 661. 



HAB. Fissures of rocks-. Hill of Kinnoul, Perth, Lightf. 



2. POLYPOD1UM. 



Sori (or clusters of fructification) roundish. Involucre 0. 



* Fronds pinnatifid. 



1. P. vulgare, fronds deeply pinnatifid, the segments linear- 

 lanceolate obtuse crenulate approximate, the superior ones 

 gradually smaller, caudex chaffy. Lightf. p. 667. E. B.t. ] 149. 



** Fronds blpinnatijid. 



2. P. Phegopter'iSy fronds bipinnatifid, the two lowermost pin- 

 nae deflexed, their segments linear lanceolate obtuse entire ci- 

 lated, the lowermost ones adnato-decurrent, veins hairy, son 

 marginal. Lightf. p. 669. E. B. t. 2224. 



HAB. Shady rocky places, in the Lowlands, frequent, Lightf. 



##* fronds thrice compounded. 



3. P. Dryopteris, fronds ternate bipinnate patulotis and deflex- 

 ed, the segments obtuse subcrenated, sori marginal^ root fili- 

 form. Lightf. p. 678. E. B. t. 616. 



HAB. Dry stony places, not uncommon. 



3. WOODSIA. Br. 



Sori scattered, roundish, having beneath an involucrum which is 

 cut at the edge into many capillary segments. 



1. W. hyperlorea, fronds lanceolate pinnated, pinnae ovato- cor- 

 date inciso-pinnatifid hairy beneath, sori solitary at length 

 confluent. Br. in Linn. Trans, v. 1 1. /.1 1. E.' B. t. 2023 

 (Polypodium hyperboreum.). Acrostickum ilvsnse, Huds., 

 H^ith.y (not of Linn, according to Sm.) 



HAB. Alpine rocks rare. Ben Lawers, Dickson. Glova mountains, 

 G. Don. 



4. ASPIDIUM. 



Sori roundish, scattered. Involucre umbilicated, or opening on 

 one side. Willd. 



* Fronds pinnated. 



1. A. Lonchitis, fronds pinnated, pinnse lanceolate-falcate acute 

 ciliato-serrate, the upper base acutely auricled the lower one 

 cuneate, superior pinnae bearing the fructifications, stipes 

 chaffy. E. B. t. 796, and Light)', p. 669 (Polypodium Lon- 

 chitis) . 



HAB. Shady clefts of rocks among the Highland mountains, not un- 

 common. 



