792 PINACE PINUS 
2-4 feet’ in diameter with dark brown to nearly black bark and rather 
sparsely branched with spreading or drooping usually crooked branches: 
leaves 4-10 inches long: staminate aments 1-114 inch long, the stamens 
with a large semicircular erest: cones 5-12 inches long, dark brown, pend- 
ent, on peduncles 1-2 inches long apophyses rather thin, with a prominent 
umbo and stout triangular recurved prickle 5-6 lines long : Gotyledons 7-11. 
On dry stony ridges southern Oregon. 
P. attenuata Lemmon Mining and Scientific Press, Jan. 16th, 1891. 
A small tree 10-40 feet high and 3-18 inches in diameter with rough dark- 
colored bark and short, ascending branches: leaves in threes, with thin 
close sheaths, slender, acute, with callous tips coarsely and remotely 
serrate firm and rigid, pale yellow or bluish-green, 3-7 inches long: stami- 
nate flowers in elongated spkies, cylindrical, 6 lines long: anthers terminat- 
ing in irregular toothed broad crests, surrounded by 9 bracts: cones elon- 
gated-conical, pointed, very oblique at base, strongly reflexed, 3-6 inches 
long, 134-2 inches thick, remaining closed for many years: scales flat, 
rounded at the apex, those of the outside being enlarged into promiment 
knobs arned with thick flattened incurved spines. On dry mountain 
sides southern Oregon to California. 
+ + Leaves in twos. 
P. contorta Loudon Arb. Brit. iv, 2292. A small tree 10-30 feet high 
with a short trunk 6-12 inches in diameter: leaves 1-144 inches long, acute, 
with short callous tips, finely and sharply serrulate: staminate aments cy- 
lindrical, about 6 lines long, with orange-red anthers terminating in semi- 
orbicular nearly entire crests, surrounded by 6 scales: cones oval or sub- 
cylindrical 1-2 inches long, tapering toward the apex, very oblique at the 
base: scales thin, rounded at the apex which is transversely keeled and 
slightly thickened into narrow oblong dark umbos, armed with slender 
often recurved prickles, often remaining closed several years, Common 
on the coast and on the mountains California to Alaska and the Rocky 
Mountains. 
P. Murrayana Oregon Com. A small slender tree 50-120 feet high 
and 4-12 inches in diameter, with very thin light grayish-brown bark and 
spreading or ascending branches: leaves 1-3 inches long, light green, delicately 
serrulate: staminate aments cylindrical, surrounded by 6-8 scales: cones oblong - 
cylindrical, 1-2 inches long, slightly oblique at base, tapering toward the apex 
often opening at maturity and deciduous: seeds black, the wings 6-8 lines long. 
On the high mountains California to Brit. Columbia and the Rocky Mountains 
east of the Casacde Range. 
