180 TREES OF THE NORTHERN UNITED STATES 
species for cultivation. Wild ix the North, and cultivated through- © 
out. There are varieties with bluish-green (var. cewrulea) and with 
golden (var. aurea) foliage in cultivation. 
3. Picea excélsa, Link. (Norway Spruce.) Leaves % to 1 in. 
long, rigid, curved, dark green. Cones 5 to 7 in. long, and pendent 
at maturity, with the scales slightly incurved. A large tree, 70 to 
120 ft. high, of vigorous growth, with numerous, stout, drooping 
branches; abundant in cultivation. A score of named varieties are 
sold at the nurseries, some quite dwarf, others so very irregular in 
shape as to be grotesque. 
4. Picea polita, Carr. (T1- 
GER’S-TAIL SPRUCE.) Leaves 
14 to 3% in. long, strong, ri- 
gid, sharp-pointed, somewhat 
eurved, glabrous, bright 
green, on stout branches with 
prominent buds. Leaves per- 
sistent for 7 years; not 2- 
ranked. Cones 4 to 5 in. 
long, spindle-shaped ellipti- 
eal, rounded at the ends. 
Tree of slow growth, with 
horizontal, yellowish-barked 
branches. As it is a tree 
of recent introduction (1865) 
from Japan, there are no large specimens. Hardy at Boston. 
P, polita. 
