178 TREES OF THE NORTHERN UNITED STATES 
merous, rigid, sharply mueronate, from a short, dark, overlapping 
sheath; 2 to a sheath. Cones from 2 to 2', in. long, ovate, smooth, 
clustered. Scales furnished with a point which is soon shed. A 
small cultivated tree, 30 to 40 ft. high, from the Pacific coast of the 
United States. As it has an irregular shape, and crooked hranches, 
it is not often planted. 
21. Pinus Banksiana, Lambert. 
(GRAY OR NORTHERN ScruB PINE.) 
Leaves in twos, short, 1 in. long, ob- 
lique, divergent from a close sheath. 
Cones lateral, conical, oblong, usually 
eurved, 113 to 2 in. long, the seales 
thickened at the end and without 
points. A straggling shrub, sometimes 
a low tree, found wild in the extreme 
Northern States. 
22. Pinus édulis, Engelm. (PINON oR 
Nout-pPing.) Leaves mostly in pairs, rarely 
in threes, 1 to 14g in. long, from short 
sheaths, light-colored, rigid, curved or 
straightish, spreading; cones sessile, glo- 
bose or nearly so, 2 in. long; tips of scales 
thick, conical-truncate, no awns or prickles; 
seeds large, nut-like, wingless, edible. A 
low, round-topped tree, branching from 
near the base, 10 to 25 ft. high; from the 
Rocky Mountains. A fine small pine; ecul- 
tivated in the East. It needs some 
protection at Boston. The figure shows 
the seed. Pinus monophylla, Torr. 
and Frem., from the mountain regions 
farther west, has its leaves in ones 
and twos; when in ones, round and 
very rigid; when in pairs, flat on the 
inner side; leaves on the young shoots 
bluish, glaucous green, or silvery. This 
; is probably only a variety of P. edulis. 
T The seeds of both are so large and nu- 
tritious that they are extensively used 
for food by the Indians. 
P. monophy])a 
