174 
BOTANY. 
Edited by W. Scott, B.A 
Pell^ea densa, Hooker. In looking over some ferns and plants 
collected by me on the Guelph Dolomites of Durham, County Grey, 
Ontario, in 1883, I chanced to observe a fern which had not hitherto 
been noticed by me with care and which turns out to be interesting. 
Having taken it to Prof. Macoun for identification, he immediately 
recognised the same to be a specimen of Pellcea densa, Hook. 
This note is intended merely to place on record the discovery of 
this little " cliff-brake " in the Province of Ontario. I found it at Dur- 
ham near the saw-mill dam on the Little Saugeen River, in September, 
1883, growing in the crevises and nooks of the Guelph dolomites there 
exposed. 
The following notes on the geographical distribution of this plant 
may be found in Macoun's "Catalogue of Canadian Plants," Part V. 
Acrogens, p. 261. " A rock species, confined so far as known to 
the provinces of Quebec and British Columbia, where it is rare. Found 
by Prof. Allen on Mount Albert, Shickshock Mountains, Gaspe, Que., 
in 1881, growing exposed to the sun on the steep walls of ravines, at 
2000 to 3000 feet elevation. (Eaton.) Abundant on cliffs along the 
Fraser River above Yale and within the Cascade Mountains ; notably at 
Chinaman's Bluff, on rocks, Sicamous, Shuswap Lake ; and summit of 
Mount Finlayson, Vancouver Island, B.C. (Macoun.) Mount Finlay- 
son, Vancouver Island, B.C. (Anderson.)" 
From the above it can be readily seen that so far as known Pellcea 
densa has been found in Gaspe, Quebec and in British Columbia, two 
extreme points of the Dominion of Canada, and therefore it seemed an 
interesting fact to record this species from an intermediate station in 
Ontario. The habitat in Ontario is similar to that in other places. 
H. M. Ami. 
