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MYRICACEAE 
Myrica Gale L. Sweet Gale. 
Apparently rare or occasional in the park area, and thus far known 
only from “ swamplands ” in the northern district. 
Clewi river, Russell, No. 51. 
BETULACEAE 
Betula papyrifera Marsh, var. neoalaskana (Sarg.) Raup. See Cont. Am. Arboret. 
vi, 152 (19M). White Birch. 
Common throughout the timbered areas, but abundant in only a few 
localities. Trees usually 6 to 10 inches in diameter, but occasionally 12 
to 15 inches. One of the most useful trees the region affords. The bark 
has been used for generations by the Indians for the manufacture of 
canoes and many kinds of utensils. It is light, easily laced and sewn, 
and easily made waterproof. The wood is light and easily worked, and 
is the nearest approach to hardwood available. Found in flower during 
mid- June, and in fruit during July and August. 
Along Quatre Fourches river, Nos. 601, 605; Government Hay Camp 
district, Slave river, No. 2181; Pine Lake district, No. 2182; Moose 
(Eight) Lake district, Nos. 2179, 2180; base of eastern slope of Caribou 
mountains, No. 2183; lower Slave river, No. 604. 
B. microphylla Bunge. B. fontinalis Sarg. 
Occasional in the park area, and collected thus far only on the shore 
of Pine lake and in a muskeg at the base of Caribou mountains. In fruit 
in the latter part of June and the first part of July. 
Pine Lake district, No. 2177; base of eastern slope of Caribou moun- 
tains, No. 2178. 
B. pumila L., var. glandulifera Regel, Swamp Birch. 
Apparently rare or only occasional in the park area, and collected 
thus far only in a single upland muskeg. Fruiting in mid-August. 
Moose (Eight) Lake district, No. 2176. 
B. glandulosa Michx. Dwarf Birch. 
Abundant in muskeg thickets throughout the upland, and in thickets 
between prairies on the Salt Plain. It is one of the most important ele- 
ments in the muskeg shrub cover, and precedes the black spruce in the 
development of muskeg timber. 
Near Heart (Raup) lake, No. 2173; Fort Smith, No. 579; Pine Lake 
district, No. 2171; base of eastern slope of Caribou mountains, No. 2174; 
eastern edge of Caribou Mountain plateau, No. 2175. 
Alnus crispa (Ait.) Pursh. A. alnobetula Am. auth. Bog, or Woodland Alder, 
Abundant in upland woods, chiefly of the coniferous type. It is found 
both on dry, jackpine ridges and in deep, mossy, spruce woods. In both 
of these it makes up a large proportion of the scant undergrowth. The 
richest stands the writer has seen are on the upper slopes of Caribou 
mountains. Immature fruits are found in late June and early July, and 
mature ones in August. The plants appear to be in full flower during 
the second week in June. 
