WINTER KEY TO THE SPECIES OF PICEA 
a. Leaves 34-1 inch long, sharp pointed; twigs glabrous. 
b. Cones 1-2 inches long, maturing in first season; leaves 
ill-scented when bruised.............. P canadensis, p. 21. 
bb. Cones 3-6 inches long, maturing in second season; leaves 
not ill-scented when bruised.............. P. abies, p. 25. 
aa. Leaves 1%-3% inch long, blunt-pointed; twigs rusty-pubescent 
Seog Ss ela uae ayant ae re he eka age P. mariana, p. 23. 
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