37 
Detailed studies have been made by the writer at a muskeg north of 
Pine lake, at various places on the shores and in the vicinity of Moose 
lake, and on the shore of a small lake at the base of Caribou mountains 
(Figure 3, H, J, K). 
AQTJATIO AND SHORE-LINE ASSOCIATIONS 
Mossy shores are typified by a section of the muskeg near Pine lake 
(Figure 3, H), The open water is being invaded actively by a moss, 
Hypnum sp. ? which fills large areas and is associated with Utricularia vul- 
garis. In this pond there is not much free space left in the centre. The 
dominant moss, accompanied by Meesia longiseta, forms the substratum 
for the associations that lie between the water and the invading Sphagnum 
hummocks. The more compact mats of moss have a stand of the buck-bean 
Menyanthes trijoliata , which was in fruit on July 9, when the survey was 
made. 
A zone of sedges follows that of the buck-bean and the moss. 
Primary sp.; Car ex aquatilis 
Secondary spp.: Triglochin maritimum 
Car ex diandra 
Eriophorum. spissum 
Stellaria crassi folia 
Potenlilla pains Iris 
Epilobium palustre 
Menyanthes trijoliata 
XJtricularia vulgaris 
Galium trifidum 
Hypnum sp. 
Meesia longiseta 
The sedge stands in rather close arrangement, and none of the other species 
is present in any numbers. In a few places this association alternates with 
another: 
Primary spp.: Car ex rostrata 
Petasites sagit talus 
Secondary spp.: Sparganium minimum 
Car ex aquatilis 
Eriophorum angustijolium 
Potentilla pa bis Iris 
Epilobium pains Ire 
Utricularia vulgaris 
The Carex rostrata-Petasites association may he distinguished at a 
distance by its lighter green mixed with the grey-green of the latter plant. 
The two associations just described, with minor variations, are very 
common throughout the region. Vast areas of the Moose Lake basin are 
covered with them to such an extent that overland travel is nearly impos- 
sible. Figure 3, J, shows them in a muskeg along the Pine Lake-Peace Point 
trail about 15 miles north of Peace point. 
