436 Mr. Don's Remarks on some British Ferns. 



in the Supplement to English Botany under the name of rigidum, but having 

 been lately favoured by the Rev. W. T. Bree with cultivated specimens of the 

 plant gathered by him on Ingleborough, I am now satisfied that my suspicions 

 were unfounded, and that it is really the same with the plant of Swartz, which 

 is accurately figured by Schkuhr in bis Kryptogamische Gewdchse, tab. 38. 

 There is a Swiss specimen from Davall, and another collected in Dauphiny in 

 the Smithian herbarium, which only differ from Mr. Bree's cultivated speci- 

 mens in their smaller size. The species, which is truly distinct, evidently 

 ranks next to dilatatum and spinulosum, but differs from both in its larger and 

 more crowded sori, and in its broader and more depressed indusium. The 

 fronds are lanceolate, and both the stipes and rhachis are copiously clothed 

 with long narrow ramentaceous scales, as in Aspidimn aculeatum. In dilata- 

 tum and spinulosum the rhachis is nearly naked, and the stipes is furnished 

 with fewer and broader scales. 



The more delicate fronds, having the pinnulse pinnatifid, with the lobes 

 serrated with pointed ipcurved teeth, and the more scaly rhachis essentially 

 distinguish it from Neph'odium FiUx mas, between which and spinulosum it 

 appears to be intermediate in its habit and characters. 



I beg to propose the following character for the species : 



N. rigidum, fronde lanceolata bipinnata : pinnulis oblongis pinnatifidis : laciniis 

 argutfe dentato-serratis : venulis inconspicuis, soris biseriatlm contiguis, 

 indusio scarioso dilatato, stipite rhachique dens^ paleaceis. 



Aspidium rigidum. Swar-tz, Syn. p. 53. Schkuhr, Krypt. Gew. p. 40. t. 38. 

 Willd. Sp. PI. v. p. 265. Spreng. Syst. iv. p. 106. Hook, in Engl. Bot. 

 Suppl. t. 2724. 



Polypodium rigidum. Hoffm. Germ. ii. p. 6. 



P. Villarsii. Bellard. App. ad Fl. Pedem. p. 49. 



P. fragrans. Fill. Delph. iii. p. 843. (excl. synon.) 



Polystichum strigosum. Roth, Germ. iii. p. 86. 



Habitat in Angliae borealis comitatus Eboracensis montosis. Gul. T. Bree. % . 

 {v. s. c.) 



3. ASPLENIUM FiLIX FOSMINA. 



There are two veiy marked varieties of this plant ; the one with broader 



