124 CTSTOPTERIS MONTANA. 
Fern are the Highlands of Scotland, where it was found, 
first on Ben Lawers, one of the Bredalbane mountains, by 
Mr. Wilson, in company with Professors Hooker and Gra- 
ham, in 1886 ; and subsequently by Messrs. Gourlie. Adam- 
son, Borrer, and Little, and Dr. Walker Arnott in 1841, 
1850, and 1851, in a ravine called Corrach Dh' Oufillach, 
or Corrach Uachdar, between Glen Dochart and Glen 
Lochay, in the Mhiel Oufillach mountains in Perthshire. 
It is reported to have been found in North Wales by 
Plukenet, and we are informed that the existence of the 
species in Wales has been recently confirmed, though the 
information is incomplete; it is not, however, improbable, 
as the species is met with in the Alps of Europe, occurring 
most frequently in the north, and generally on rough stony 
ground. It is also a native of the Rocky Mountains of 
North America. . 
" This is strictly an Alpine plant, and requires treatment 
similar to that recommended for the other species, with per- 
fect rest in winter." 
