io KEY TO GENERA AND SPECIES 



12. Mature leaves not conspicuously 

 whitened beneath. Cones hang- 

 ing or pendulous, with leaf-like 

 toothed appendages projecting be- 

 yond the scales. Cult. Native 

 west of our range. (Fig. 14.) 

 Douglas Spruce, Red Fir, Douglas 

 Fir, Pseudotsuga taxi/olid Britt. 



Fig. 14. 

 Douglas 

 Spruce ; 

 2 leaves 

 and a 

 section. 



13- Leaves simple, with a single blade. 

 (See Figs. 96, 243014- 



13. Leaves compound, with 3 or more wholly 



separate blades (leaflets). (See Figs. 117, 

 203063. 



14. With 3 or more main veins of nearly equal 



prominence starting 

 from the base of the 

 blade. (See Figs. 19, 

 246015. 



14. With only one prominent 

 vein. (See Figs. 84, 



14. With very many fine 

 veins, all of equal prom- 

 inence, radiating from 

 Fig. 15. Ginkgo. the base of the fan- 



