Pinaceae 27 



less frequency throughout the Rockies 

 from Banff to Field, from 6000 to 8000 feet 

 elevation, at or near the tree limit, often 

 much stunted and almost shrub-like; very 

 abundant on the mountain^ in the region 

 about Lake Louise. 



A tree usually 40-100 feet high 



Abies lasio- 



caipa w a trun k I- 5 f eet m diameter, 



(Hook) short crowded tough branches, 



Nutt. Sub- usually slightly pendulous near 



alpine Fir, ^ bage and forming dense 



Balsam Fir. 



spire-like slender heads; bark 



rough on the older trees, with thick, ap- 

 pressed, cinnamon-red scales; leaves pale 

 blue-green flat, i if inches long on the lower 

 branches, rounded or notched at the apex; 

 on the upper branches thickened, not more 

 than J an inch long,, flattened and closely 

 appressed with long rigid points; cones, 

 oblong-cylindric, rounded, truncate or de- 

 pressed at the narrowed apex, dark purple 

 and soft hairy, 1^-4 inches long with scales 

 gradually narrowed from the broad rounded 



