138 
POLYPODIACE.E. 
Caernakvonshire. — I think there can be no doubt that this 
fern is the Filix alpina found by Dr. Kichardson on a moist 
rock called Clogwyn-y-Garnedd, one of the highest points of 
Snowdon,” as recorded in Ray’s ‘ Synopsis.’* Bolton appears 
to have figured the same fern, from the same locality, under the 
name of Acrostichum Ilvense. Mr. Wilson found it near Llyn- 
y-cwn, on Glyder Vawr, in 1824 j and it has since been seen by 
Mr. Borrer, Mr. Roberts of Bangor, and I believe several other 
botanists, directed to the spot by Mr. Wilson. I am indebted 
to the kindness of Mr. Wilson and Mr. Pamplin for specimens 
from the Llyn-y-cwn locality, but I believe there are no speci- 
mens now in existence from Clogwyn-y-Garnedd ; the two fronds 
represented at a, on the preceding page, are from this station. 
Durham. — Mr. Winch, in his ‘Flora of Northumberland and 
Durham,’ gives these localities, “ Near the summit of some bold 
basaltic rocks, called Falcon Clints, about ten miles west of 
Middleton, in Teesdale, Mr. S. Halestone. At the foot of ba- 
saltic rocks, on the Durham side of the river Tees, about two 
hundred yards below Cauldron Snout, Mr. J. Backhouse.^'* Mr. 
Winch observes that these localities must be near together. — 
Mr. Simpson observed the plant there in 1838, and has kindly 
presented me with a frond. “ Recrossing the bridge,” says Mr. 
Simpson, “ we pursued the course of the stream, which, almost 
immediately below the Snout, takes a sudden turn, and thus we 
found our track hemmed in by the over-laden Tees on our right 
hand, and the lofty basaltic rocks called Falcon Clints on our 
left. My eye was now anxiously directed to the face of these 
rocks, to discover, if possible, the chief object in taking our 
present course — Woodsia Ilvensis. Rain now began to fall 
heavily, and the wind, which had been all day very tempestuous, 
bore it against us so as to render observation, either of locality 
or objects, very imperfect. However, after tracing as near as I 
can judge about 400 yards, I espied some small specks of green 
through the broken fragments of a stream which poured over 
the Clints, and under which I soon stood, pulling hastily the 
patches I had seen, and these, to my delight, proved to be two 
^ Syii. 118 . 
