•92 PIXACK/E 



PINU8 



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 J£ inch long, the stamens 

 with a large semicircular* rest: 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. attenuate Lemuion Mining and Scientific Press, Jan. 16th, 1891 

 A r-mall tree 10-40 feet high and :->-i8 inches in diame'er with rough dark- 

 col red baik and short, ascending 1 ranches : leaves in threes, with thin 

 rb>se sheaths, sjender, acute, with callous tips coarsely and remotely 

 serrate fi. m. and rigid, pale yellow or bluish areen", 3-7 inches long: stami- 

 iiatH Howei s in elongated spkies. cylindrical,, <i lines long : anthers terminat- 

 i eg in irregular toothed broad crests, surrounded by 9 bracts: cones elon- 

 gated-conical, pointe , vet •>• oblique a r t base strongly reflexed. 3-6 inches 

 long l%-2 inch* s thick, remaining closed tor many years: scales flat. 

 rounded at the apex, those of the outside being enlarged into promiment 

 kn>bs aiicd with thick flattened incurved spines. On dry mountain 

 sides southern Oregon to California. 



+- ■*- Leaves in twos. 



l\ contorta Loudon Arb. Brit, iv, 2292. \ small tree 10-3 ) feet high 

 with a short trunk ft-12 inches in diameter: leaves 1-1 J* 2 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 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 A'aska and the Rocky 

 Mountains. 



P. Murrayana Oregon Com. A small slender tree 50-12.) feet high 

 aud 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 1 ase. 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. 



