ASPLENIUM — PTERIS. 415 
bourhood of the Tarn. In the West Swale district in Whit- 
stondale, Punchard's gill, and at Keasdon force, and down the 
dale as far east as Aislabeck near Richmond. Hell gill, and 
numerous stations in Wensleydale, ascending to the Limestone 
pavement of Widdale fell and Camfell. On the east in two or 
three of the glens of the Hambleton range near Hawnby.* 
Asplenium Trichomanes L. Native. Area 9 8 7 5 4 3 2. 
Range 0-500. Frequent upon walls and rocks, especially 
amongst the hills, ascending to Blea beck scars and the Main 
Limestone cliffs of Harlen fell and Booze moor. 
A. marinum L. Native. Maritime. Area 3. RangeCL. 
Amongst the coast cliffs at Burniston Wyke near Scarbro'. 
A. Adiantum-nigPum L. Native. Area 9875432 i. 
Range 0-450. Frequent upon walls and rocks, especially 
amongst the hills, ascending to the Main Limestone cliffs at 
Harlen fell. 
A. Ruta-muraria L. Native. Area general. Range 
0-650. Frequent upon walls and rocks, ascending to the 
limestone pavement of Widdale fell. 
Scolopendrium vulgare Sym. Native. Area 98765 
432. Range 0-450. Frequent in rocky places, especially 
amongst the hills, ascending to the Main Limestone scars of 
Copperthwaite moor. 
Blechum boreale Swartz. Native. Area 987543 2 i. 
Range 0-850. Common upon heaths, ascending to the peak 
of Micklefell. 
Pteris aquilina L. Native. Area general. Rang 0-601. 
Frequent in the less cultivated tracks, both in the low country 
and amongst the hills, up to as high as the upper limit of the 
Agrarian region. The highest stations in which I have seen 
* Closely allied to AUosorus in its North Yorkshire distribution. 
Both are frequent ferns throughout the western range of hills, and 
both occur very sparingly in the east But whilst the Asplenium 
specially affects the scars of limestone, the AUosorus is usually to be 
met with upon edges of gritstone, either Millstone Grit proper or the 
bands of Gritstone which are interpolated between the terraced lime- 
stones of the Yoredale series. 
Jan, 1905. 
