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 1-1% 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: cotyledons 7-11. 

 On dry stony ridges southern Oregon. 



P. aft e nil at a Lemmpn 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, l%-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 London Arb. Brit, iv, 2292. A small tree 10-30 feet high 

 with a short trunk 6-12 inches in diameter: leaves 1-1% 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 Kooky 

 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. 



