CATALOGUE OF FOREST TREES. 205 



/ 384. Picea Engelmanni, Engelmann, 



Trana. St. Louis Acad, li, 212; Wheeler's Rep. vi, 256; Loudon Gard. Chronicle, 1879, 334; 1882, 145. Carriftre, Trait. Conif. 2 ed. 

 348. G. M. Dawsou in Canadian Nat. new ser. ix, 325. Rnsby in Bull. Torrey Bot. Club, ix, 80. 



J.Wc a/6a, ? To rrey in Fremont's Rep. 97. 



Abies nigra, Engelmann ill Am. ,Jour. Sci. 2 scr. xxxiii, 330 [not Poirct]. 



Abies Bngehnanni, Pan-y in Trans. St. Louis Acad, ii, 122 ; London Gard. Chronicle, 1863, 1035; Am. Nat. yiii, 179; Proc. 

 Davenport Acad, i, 149, Regel, Gartenflora, 1864, 244. Henkel & Hochstetter, Nadelholz. 418. Hoopcs, Evergreens, 

 177, f. 22. Watson in King's Rep. v, 332; PI. Wheeler, 17. Porter in Hayden's Rep. 1871, 494. Porter & Coulter, Fl. 

 Colorado ; Hayden's Sury. Misc. Pub. No. 4, 130. Vasey, Cat. Forest Trees, 33. Koch, Dendrologio, ii'', 242. Hall in 

 Coulter's Bot. Gazette, ii, 91. Sargent in London Gard. Chronicle, 1877, 631. Macoun in Geological Rep. Canada, 

 1875-'76, 211. Brandegee in Coulter's Bot. Gazette, iii, 32. Bell in Geological Rep. Canada, 1879-'80, 56=. Veitch, 

 Manual Conif. 68. 



PinUS Engelmanni, Engelmann in Proc. Am. Phil. Soc. new ser. xii, 209. 



PinUS COmmutata, Pariatore in De CandoUe, Prodr. xvi, 417. Gordon, Pinetum, 2 ed. 5. 



WHITE SPKUOB. 



Peace Eiver plateau, iu latitude 55 46' N. (G. M. Dawson), through the interior of British Columbia and along 

 the Cascade mountains of Washington territory and Oregon to the valley of the Mackenzie river; along the 

 principal ranges of the Rocky and Wahsatch mountains to the San Francisco mountains, Sierra Blanco, and mount 

 Graham, Arizona. 



A large tree, 24 to 46 meters iu height, with a trunk 0.90 to 1.20 meter in diameter, or at its extreme elevation 

 reduced to a low, prostrate shrub ; dry, gravelly slopes and ridges between 5,000 and 11,500 feet elevation ; the 

 most valuable timber tree of the central Eocky Mountain region, here forming extensive forests, generally above 

 8,500 feet elevation; rare and of small size in the mountains of Washington territory, Oregon, and Montana. 



Wood very light, soft, not strong, very close, straight-grained, compact, satiny ; bands of small summer cells 

 narrow, not conspicuous, resin passages few, minute ; medullary rays numerous, conspicuous ; color, pale yellow 

 tinged with red, the sap-wood hardly distinguishable ; specific gravity, 0.3449 ; ash, 0.32 ; iu Colorado manufactured 

 into lumber and largely used for fuel, charcoal, etc. 



The bark rich in tannin, and in Utah sometimes used in tanning leather. 



Note. Forms of northern Montana too closely connect this species with the allied P. alba. The two species occur here, however, 

 only at different elevations, in different soils, and never mingle. 



385. Picea pungens, Engehnann, 



London Gard. Chronicle, 1879, 334 ; 1882, 145. Masters in London Gard. Chronicle, 1883, 725, f. 130. 



P. Menziesii, Engelmann in Trans. St. Louis Acad, ii, 214 [not Carrifere]. 



Abies Menziesii, Engelmann in Am. Jour. Sci. 2 ser. xxxiii, 330 [not Lindley]. Gray in Proc. Philadelphia Acad. 1803, 

 76. Watson in King's Rep. v, 333, in part. Parry in Am. Nat. viii, 179 [not Lindley]. Porter in Hayden's Rep. 1871, 

 494. Hoopes, Evergreens, 166, in pari. Rothrock in PI. Wheeler, 28 ; Wheeler's Rep. vi, 10 [not Lindley]. Porter & 

 Coultor, Fl. Colorado; Hayden's Surv. Misc. Pub. No. 4, 131 [not Lindley]. Vasey, Cat. Forest Trees, 33, in part. 

 Brandegee in Coulter's Bot. Gazette, iii, 32. 



Abies Menziesii Parryana, Andr^ in 111. Hort. xxiii, 198; xxiv, 53, 119. Roezl in 111. Hurt, xxiv, 86. 



Abies Engelmanni glauca, Veitch, Manual Conif. 69. 



WHITE SPRUCE. BLUE SPRUCE. 



Valley of the Wind river, south through the mountain ranges of Wyoming, Coloriido, and Utah. 



A tree 30 to 4(5 meters iu height, with a trunk 0.60 to 0.90 meter in diameter; borders of streams, in damp Oi 

 wet soil, generally between 6,000 and 9,000 feet elevation, never forming forests or reaching as high elevations an 

 the allied P. Engelmanni ; rare and local. 



Wood vei-y light, soft, weak, clo.sc-grai ned , compact, satiny ; bands of small summer cells narrow, not conspicuous', 

 resin passages few, small ; medullary rays uumerou.s, prominent ; color, vei'y light brown or often nearly white, th>' 

 ap-wood hardly distinguishable; specific gravity, 0.3740; ash, 0.38. 



