6 SELECTED WESTERN FLORA 



1. L. laricina, (Du Roi) Koch. Tamarack, Hackmatack. 



Cones roundish, consisting of a few scales. A slender tree with reddish 

 bark and hard resinous wood. (£. Americana, Michx.) Swamps, Man.- 

 Alta. 



, 3. PICEA. Spruce. 



Leaves about | in. long, scattered on all sides of the stem, needle- 

 shaped, stiff; cones pendulous, maturing the first year; otherwise 

 resembling Pinus. 



1. P. canadensis, (Mill.) B. S. P. White Spruce. 



Branchlets smooth, leaves slender, somewhat pale green ; cones cylindri- 

 cal, deciduous. A fine tree with white wood, much used for both timber and 

 decoration. (P. alba, Link.) Wet or sandy places, Man.-Alta. 



2. P. mariSna, (Mill.) B. S. P. Black Spruce. 



Branchlets pubescent, leaves shorter, 



S^^^^S^^^^^^^iS^^ stouter, and darker green than in the 

 preceding ; cones smaller, almost glob- 

 ular, persistent. A valuable tree much 

 resembling the preceding and found 

 Fig. 8. — Picea mariana. in the same range. (P. nigra. Link.) 



3. P. Engelmlnnii, (Parry) Engelm. 



Leaves J-1 in. long, four cornered, distributed singly and evenly along the 

 branches; branchlets slightly pubescent; cones oval, about 2 in. long, the 

 scales thin and blunt. A tall conical tree with reddish bark, but becoming 

 shrubby at high elevations. Rocky Mts. 



4. ABIES. Fib. 



Leaves flattened, arranged on two sides of the branch; cones 

 erect, maturing the first year, deciduous. 



1 . A. bals&mea (L.) Mill. Balsam. 



Leaves narrowly linear; cones cylindrical, violet-colored when immature. 

 A conical shaped tree with rather smooth, gray bark, containing numerous 

 blisters of resinous juice. E. and N. Man. to Lat. 58° and north-westward. 



5. THUJA. Aebor ViTiB. 



Leaves appressed, imbricated, some 

 awl-shaped and others scale-like; 

 cones of few scales, spreading at ma- 

 turity. 



1. T. occidentilis, L. White Cedar. 



Leaves appressed in 4 rows on flat 

 branchlets; scales of cones blunt. A Fig. 9. — Thuja occidentalis, 



