ea as cable eke peed So at 
Pak SOUMne Shee, 
Z.. P. albicaulis fngelm. > ‘hite-bark Fine. —————> Commonly a small tree 
confined to high ridges in our region, in favorable situations reaching a 
DeBeHe of 5-6 dcm., more commonly 2-3 dem, 20-25 m. tall, the trunk and 
lower branches then massive in proportion, tapering; branches spreading, 
branchlets somewhat woolly, crown more or less ovoid and obtuse; young 
park smooth, light grey or ashy, rather dull, the mature bark, 1 cm. or less 
thick, scaly, the flakes thin, 2-4 cm. in diameser, the inner bark brownish; | ae 
foliage abort coal loaves tufted at the ends of the branches, 
PEBEL OTHE 5 in the cluster, scales sheathing the needles 
for about 1.5 cm ina soon deciduous, leaving. the cluster naked; needles 
4-6 cme long, about 1.2 ma. thick, triancular in outline, green, persistent 
6-8 years, the mrgins smooth, stomata inconspicuous, the apex blunt; stam- 
inate cones bright purple, in axillary clusters just below the most recent 
cluster of leaves, about 1 cm. long, ovoid, the scales rounded,half the 
length of the catkin; stamens 2 mm. long, the tip triangular; ovulate cones 
borne near the apex, about 1 cm. long, oval, bright purple and somewhat 
glandular in flower, 4-8 cm. long at maturity, sessile, ovate, the scales 
closely rressed together, never spreading widely, purplish, subrotund, 
1-5-2 cm. long, 6-8 mm. thick, shortly acuminate, the callous impressed; 
seeds 6-9 mm long, the wing narrow, remaining attached to the scale. 
Seedling 5-6 cm. tall, the hypocotyl light brown, cotyledons 8-10, trian- 
gular in cross-section, 225-5 cm. long, 1-1.5 mm. wide, tapering, acute, 
entire; first leaves 1-1.5 cm. lons, finely toothed along the margin, rather 
glaucous. 
iidses, mostly above 6000 ft., where it occasionally forms an open 
forest in pure stand or associated with Tsuga Mertensiana or Abies jasiocarve, . 
occasionally descendin; cool slopes as low as 5000 ft., when often occurring q 
with Pinus monticola from which it may be distinguished by the coarser 
needle which is smooth on the edges. Youn; trees may occur as low as 2500 
feet but this is wmusual. 
