106 
HISTORY OE BRITISH EERNS. 
pinnae and oblong blunt pinnules, which are 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. Filix-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 Yorkshire, and has 
been since met with on the limestone ranges of West¬ 
moreland and Lancashire. In cultivation it is usually a 
free-growing plant, more lax than in the wild state, and 
one of the most elegant of the larger kinds. 
The generic names of Polypodium , Aspidium, and 
Polystichum , have been applied to this plant; and it has 
been more recently separated, with others, by Mr. Newman, 
