324 A MANUAL OF FORESTRY. 



"Wood knotty, very white and satiny, with a tinge 

 of yellow or pink. Sharp annual rings and few minute 

 resin canals. 



Seeds small, coffee-brown, with paler oval wing. 

 Cotyledons generally 8 (vary from 5 to 10), curved 

 upwards, finely toothed at edges. They persist till the 

 third year. 



2. SILVER FIR. 

 Abies pectinata (D.C.). Abietinea3. 



Tall tree, with branches in tiers. Twigs green to 

 brown. The cortex long persistent, and the stem 

 smooth, silvery-grey. Bark not well-developed, marked 

 by shallow longitudinal fissures and lozenge-shaped 

 scales, often covered with lichens. 



Buds much like those of the Spruce, but more silvery 

 as they open. 



Leaves differ from those of Spruce in being flattened, 

 with two broad, silvery lines of stomata below, the apex 

 blunt and emarginate, twisted so that they tend to lie 

 right and left on the twigs. The leaves may persist for 

 8 to 11 years. 



Male cones yellow, at the apex of last year's shoots. 

 Female cones terminal, erect, dull green and then 

 brown, with caducous scales, of two kinds, which fall 

 at the end of the year and leave the erect naked axis. 



Wood very like that of the Spruce, but almost devoid 

 of resin-canals, and therefore less resinous. 



Seed larger than that of Sprnce, trigonal, and with a 

 squarer wing. Cotyledons of seedling usually 5 or 6 

 (vary from 4 to 8), flat and spreading, and with the 

 silver lines on upper surface. 



