February, 1920] 



The Canadian Field-Naturalist 



27 



heavy fall of rain saturates this peaty moss the 

 weight is too great for it to remain in position and 

 it breaks away and slides down to the water's 

 edge. 



The dominant feature of the island is the bog 

 spruce, Picca mariana. It is by far the commonest 

 and largest tree on the island. Near the shore in 

 a few places the poplars are plentiful, but elsewhere 

 they are scarce, the two species Populus treruuloides 

 and P. balsamifera are evenly distributed. Larix 

 laricina is not infrequent among the spruce. 



The interest of the small sandy portion of the 

 island centres on the variety of willows of which 

 there are seven species, some of them being typically 

 northern ones, as Salix Candida and 5. argyrocarpa. 

 Mertensia paniculala is frequent here. The follow- 

 ing beach plants are also restricted to this area, 

 Lathyrus maritimus, L. paluslris, Artemisia caudata, 

 and /uncus hallicus var. liltoralis. 



Two plants usually found in limestone regions, 

 Rhinanthus Kyrollae and Primula mistassinica, are 

 found on a small mud flat which has been thrown 



• J} o 



L.W 



INN IPEG 



^Mile 



Fiii. 1. Map showing tlio .sourcf of the Xclson rivLT aiul ilio 

 island in the source of Warrens Landing. 



A dense shrubbery undergrowth prevails through- 

 out the greater part of the island and the Labrador 

 tea. Ledum groenlandicum, is the most prevalent. 

 Other shrubs less numerous although fairly plentiful 

 are Kalmia polifolia, Chamaedaplme calyculala ; 

 and Viburnum pauciflorum. 



Under the shrubs many species, typical of north- 

 ern regions, are found in large numbers. These in- 

 clude Rubus arciicus, Rubus chamacmorus. Ranun- 

 culus lapponicus, Petasiies trigonophyllus, and Slell- 

 aria longipes var. laeta. 



up by lake storms and is rich in fragments of broken 

 calcareous shells. 



Owing to the heavy and frequent rains many 

 plants were found submerged. One patch of 

 Drosera rotundifolia, was in from si.\ to eight inches 

 of water, nearly every plant was in flower and 

 every flower was two inches or more above the 

 water. 



In the following list of species the arrangement 

 and nomenclature is as far as possible that used 

 in the seventh edition of Gray's Manual of Botany. 



