414 baker's north YORKSHIRE. 
Common in woods and amongst rocks, ascending to the Main 
Limestone of Micklefell. 
Lastrea cristata Presl. Native. Area 6. Range 50. 
South end of Askham bogs, discovered by Mr. Thornton 
in 1873. 
L. spinulosa Presl. Native. Area 8654321. Range 
0-200. Frequent in the lovv^ country woods, especially in the 
carrs of the Central Valley, ascending to ArnclifFe woods near 
Egton bridge. 
Var. L. uliginosa Newm. Has been found by Mr. R. 
Miller Christy in Askham bog, and in Stockton woods ; 
and by Mr. Le Tall on the edge of Strensall common. 
L. dilatata Presl. Native. Area general. Range 0-800. 
Common in woods and amongst rocks, ascending to the peak 
of Dodfell, the gritstone edges of Lovely Seat, and the Main 
Limestone of Micklefell. L. collina Newm. has been found by 
Mr. Mudd in the neighbourhood of Great Ayton. 
L. Foenisecii Wats. Native. Area 4 3. Range 0-150. 
In Cock Mill Woods near W^hitby, and in the wood on the 
east side of the dale of Derwent at Everley near Hackness. 
Reported lately from Strensall on the authority of Miss 
Milner. 
Athyrium Filix-foemina Roth including rhceticmn and 
luolle. Native. Area general. Range 0-550. Common in 
shaded woods and amongst rocks, ascending to Cronkley 
and White force scars, and the Main Limestone cliffs at 
Punchard's gill. 
Asplenium viride Huds. Native. Montane. Area 
9873. Range 200-800. Frequent amongst the western 
hills, especially upon the limestone scars. In Teesdale it 
descends to Lonton, and ascends to the Main Limestone of 
Micklefell. In Deepdale it grows upon the rocks in the upper 
,part of the glen, and in Lunedale upon the crags in the neigh- 
