106 HISTORY OF BRITISH FERNS. 



pinna) and oblong blunt pinnules, Avliicli arc cut into 

 broad rounded segments, again notched into a varying 

 number of pointed but not spinulose teeth. The stipes is 

 densely scaly. The veining is very similar to that of the 

 large variety of L. FlUx-mas ; the pinnules having a. 

 flexuous midvein, with alternate venules again pinnately 

 branched. The clusters of spore-cases are borne on the 

 lowest anterior branch of each venule, that is, on the 

 lowest veinlet on the side towards the apex of the pinnule, 

 and they are covered by a kidney-shaped indusium, which 

 does not fall away. Over the fronds are scattered nume- 

 rous small sessile glands, which, when slightly bruised, give 

 out a faint and not unpleasant odour. 



This Fern seems confined to the limestone districts of 

 the north of England, growing at considerable elevations. 

 It was first found at Ingleborough, in Yorksliire, and has 

 been since met with on the limestone ranges of West- 

 moreland and Lancashire. In cultivation it is usually a 

 free-f^rowino- plant, more lax tlian in the wild state, and 

 one of the most elegant of the larger kinds. 



The generic names of Polypodium, Aspidlum, and 

 PohjstlcJmm, have been applied to this plant ; and it has 

 been more recently separated, with others, by Mr. Newman, 



