BLUE SPRUCE. SILVER SPRUCE. 



Picea Parryana (Andre) Sarg.^ 



Fig. 23. Branchlets with leaves and mature cones, i ; detached scales, upper side (towards apex) 

 showing seeds, 2; do, under side (towards stem), showing bract, 3; sterile branchlets, 4; branchlet 

 from which leaves have been removed, magnified to show glabrous nature, persistent Ijases of 

 leaves, etc., 5. 



24. Trunk with foliage at base and 2-ft. rule. Rocky Mountains, Colo. 



25. Wood structure magnified 15 diameters. 



