SUMMER 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 
Reha saws Meee Mae tae oh Canoes P. mariana, p. 23. 
aan pees 
