FILICES. 107 



subternately tripinnate or subquadripinnate ; lowest pair of pinnse 

 very much larger and more compound than the rest ; pinnules incised, 

 bipinnatifid or bipinnatipartite ; teeth of the ultimate segments 

 commonly notched, with the ultimate veins running into the notches ; 

 rachis and lamina more or less thickly sprinkled with minute cylindrical 

 glands. Indusium thinly sprinkled with glands, or almost glabrous. 

 Spores muricated, with numerous short rather thick blunt spine-like 

 tubercles. 



On wet mossy shady rocks. Rare and very local. It was first 

 found in Britain by the late Mr. W. Wilton, on Ben Lawers, Perth- 

 shire, in 1836 ; Messrs. W. Gourlay and W. Adamson found it in 

 1841 on the Glenlochy Mountains, at a place called Corrach Uachdar, 

 on Maol Oufillach, opposite Maol Ghaordie, where several other 

 botanists have gathered it ; Mr. Westcomb found it in the same 

 district 6 or 8 miles from this last station ; I have specimens from 

 the late Rev. W. Little and Mr. G. Maw from Grlenlochy ; from 

 Maol G-haordie, Glenlyon, collected by Dr. Buchanan White, and 

 Mr. J. Sadler, and from Ben Laoich, gathered by Dr. Buchanan 

 White and Dr. H. H. Johnson. All these stations are in Perthshire. 

 Mr. J. Backhouse has found it at the head of Canlochan Glen, 

 Forfarshire ; and it was found by Mr. A. Croall on the north side of 

 shady rocks on the south side of Glen Callater, near its head, Aber- 

 deenshire. I believe all the Scotch stations for this plant are on rocks 

 of mica-slate facing the north, but the Aberdeenshire station may be 

 an exception. 



Scotland, Perennial. Summer, Autumn. 



Caudex resembling that of Phegopteris Dryopteris, about the 

 thickness of a stocking- wire, nearly black, the younger portion 

 green clothed with large ovate hyaline scales. Fronds generally 

 about | inch apart, but often more. Stipes from 1 J inch to 1 foot . 

 long, with a shallow furrow on the anterior side, nearly as thick 

 as the rootstock at the base where it is dark-coloured, tapering 

 upwards, where it becomes green ; the upper part is remarkable for 

 the gland-fringed and gland-tipped scattered deciduous scales. Lamina 

 1£ to 5 inches long, and nearly the same in width, resembling that of 

 Phegopteris Dryopteris, but much more finely cut, and less evidently 

 ternate. 



Mountain Bladder-fern. 



p 2 



