90 
Source materials for the following list of the vascular flora have con- 
sisted mainly of the writer’s own collections. Most of these were made 
during the summers of 1928-29-30, and a considerable number of records 
for the Peace-Athabaska Delta region are derived from collections made 
in the summers of 1926-27'. There are, in all, 2,246 field numbers, involving 
10,057 specimens. Mr. John Russell, D.L.S,, has kindly loaned a small 
collection made by him in the northern area of the park during the sum- 
mer of 1926. Seventy-eight numbers from this collection, including 76 
species, have been examined by the writer and added to the list. About a 
dozen specimens were presented to the writer by Mrs. Conibear of Fort 
Smith, and have been noted accordingly. It is believed that these col- 
lections include nearly all the flowering plants and ferns known to grow in 
the region at the present time, but with continued exploration the list 
should increase considerably, since the writer makes no pretence of having 
formulated a complete flora. A few unverified records, less than half a 
dozen, have been included, with accompanying notes on tneir sources, and 
a few may be added as the further study of earlier collections is made. 
This number is bound to be small, however, since very few travellers have 
ever entered the interior country, and have not collected the less con- 
spicuous species. Unless otherwise indicated, the numbers cited in the list 
are the writer’s. 
Most of the collections are from that part of the park area that lies 
south of the 60th parallel. A few, however, come from neighbouring dis- 
tricts and may be duplicated with regard to habitat within the area. 
Plants from the eastern edge of the Caribou Mountain plateau were 
obtained just outside the western boundary of the park, but could probably 
be duplicated a little farther to the northward where the plateau extends 
east of the boundary. A number of records are from Fort Smith and 
vicinity, and from lower Slave River district, both of which are east and 
northeast of the boundary, but they have been included for the light they 
may throw upon problems of distribution. Fort Smith and the Smith 
Portage area lie on a westward extension of the Preeambrian rocks which 
make up the country east of Slave river, and accordingly have a somewhat 
more boreal flora. This is related to that of various uplands and granite 
hills in the interior or in upper Slave River district. 
The following notes will serve to explain the localities cued in the list, 
the order in which they are here given being similar to that used in the 
citations. It should be understood that the figures for longitude and lati- 
tude are approximate, and locate only in a general way ihe centres from 
which field work was carried on. 
(1) Reed Portage, Upper Embarras River , Lat. 58° 28’, Long. 111° 32'. 
A woodland trail about f mile long between Embarras river, near the 
point where it leaves the Athabaska, ancl the head of Cree (Mamawi) creek. 
Reed’s trading post is at the upper end of it, and has been for some years 
/ a stopping place on the winter trail between McMurray and Chipewvan. 
This trail leads oyer the portage, thence through the creek and across lake 
"Mamawi. 
