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 his Kryptogamische Gewüchse, 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 Aspidium 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 pinnule pinnatifid, with the lobes 
serrated with pointed incurved teeth, and the more scaly rhachis essentially 
distinguish it from Nephrodium Filiv 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 bipinnatà : pinnulis oblongis pinnatifidis : laciniis 
arguté dentato-serratis: venulis inconspicuis, soris biseriatim contiguis, 
indusio scarioso dilatato, stipite rhachique densé paleaceis. 
Aspidium rigidum. Swartz, Syn. p. 53. Schkuhr, Krypt. Gew. p. 40. t. 38. 
Willd. Sp. Pl. 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. Vill. Delph. iii. p. 843. (excl. synon.) 
Polystichum strigosum. Roth, Germ. iii. p. 86. 
Habitat in Anglice borealis comitatüs Eboracensis montosis. Gul. T. Bree. Y] . 
(v. s. c.) : 
3. ASPLENIUM FILIX FGMINA. 
There are two very marked varieties of this plant; the one with broader 
