123 
OEDER XCVII. FILICES. 
1. POLYPODIUM. 
1. P. vuLGARE. Common Polypody. August — October. 
On walls, shady hanks, and trunks of old trees, frequent. 
2. P. PHEGOPTERis. Pale Mountain Polypody. June — August. 
Dry woods. Buttercramhe moor, near York, very common. Wea- 
thercoat cave, near Settle. On the Durham side of the Tees, above 
Middleton. Wensleydale. Bell hagg, one mile from Sheffield. 
Penhill. Gill on Bellerhy moor, &c. Shibden dale, Ogden dough, 
&c. near Halifax. Rocky woods in the vale of Todmorden, frequent. 
Near Helmsley. 
3. P. DRYOPTERis. Tender Three-branched Polypody. June — July. 
In high situations in the West and North Ridings. Brimham 
rocks. Teesdale. Near Pickering. Near Whitby. Near Rich- 
mond. Woods near Halifax, frequent. Near Helmsley. 
4. P. CALCAREUM. Rigid Three-branched Polypody. July — September. 
On mountainous heaths. Frequent on the hills about Settle, 
Several places in Gordale. 
2. ASPIDIUM. 
1. A. LONCHiTis. Rough Alpine Shield-fern. July — September. 
On rocks in alpine situations. On the alpine hills above Langcliflfe, 
two miles from Settle. On the rocks called Falcon dints, ten miles 
west of Middleton, in Teesdale. 
2. A. THELYPTERis. Marsh Shield-fern. July — September. 
By the sides of ditches in marshy ground. Terrington carr. 
Askham bogs and Buttercramhe, near York. Near Copgrove. 
Near Doncaster. Near Hovingham. Near Settle. 
3. A. OREOPTERis. Heath Shield-fern. July — September. 
On heaths and in dry woods. Woods at Escrick, near York. Wheel- 
dale and Beck hole, near Whitby. Near Richmond. North Dean 
wood, and many other situations in the neighbourhood of Halifax. 
Near Helmsley. 
4. A. FiLix MAS. Male Shield-fern. June — September. 
In woods, ditches, and hank sides, frequent. 
5. A. CRisTATUM. Crested Shield-fern. August — September. 
On Plumpton rocks, near Knareshro’. 
