CATALOGUE OF FOREST TREES. 189 



351. Pinus albicaulis, Engelmann, 



Trans. St. Louis Acad, ii, 209; Coulter's Bot. Gazette, vii, 4. Gray iu Proc. Am. Acad, vii, 402. Vasey, Cat. Forest Trees, 32. Hall 

 in Coulter's Bot. Gazette, ii, 91. Lawson, Piuetum Brit, i, 1, f. 1-4. 



P. flexilis, Murray, Rep. Oregon Exped. i, t. 2, f. 1 [not James]. Lyall in Jour. Linnseau Soc. vii, 142. Parlatore in De 

 Candolle, Prodr. xvi', 403, in part. 



P. ceynbxoides, Newberry in Pacific E. R. Rep. vi, 44, 90, f. 15 [not Zuccarini]. 



P. Shasta, Carrifere, Trait. Couif. 2 ed. 390. 



P. flexilis, var. albicaulis, Engelmann in Bot. California, ii, 124. G. M. Dawson in Canadian Nat. new. ser. ix, 328. 



Coast ranges of British Columbia, from the valley of the Lltasyonco river (O. M. Dawson) south along the 

 Cascade and Blue mountains of Washington territory and Oregon, extending east along the high ranges of 

 northern Washington territory to the eastern slope of the Eocky mountains of northern Montana (Old Marias 

 pass, Canby & Sargent) ; California, Scott's mountains, mount Shasta, and on the high peaks of the Sierra Nevadas 

 to mount San Bernardino. 



A small alpine tree, 6 to 12 meters in height, with a trunk rarely 0.60 meter iu diameter, or at its highest 

 elevation reduced to a low, prostrate shrub ; dry, gravelly ridges at the extreme limit of tree growth, reaching in 

 the San Bernardino mountains an elevation of 10,500 feet. 



Wood light, soft, not strong, brittle, close-grained, compact; bands of small summer cells thin, not conspicuous, 

 resin passages numerous, not large; medullary rays numerous, obscure; color, light brown, the sap-wood nearly 

 white; .specific gravity, 0.4165; ash, 0.27. 



352. Pinus reflexa, Engelmann, 

 Coulter's Bot. Gazette, vii, 4. Rusljy in Bull. Torrey Bot. Club, ix, 80. 

 P. flexilis, var. reflexa, Engelmann in Wheeler's Kep. vi, 258. 



WHITE PINE. 



High mountains of southwestern New Mexico {Greene, Bvsby) to the Santa Rita mountains {Rothrock, Engelmann 

 <& Sargent) and Santa Catalina mountains (Lemmon, Pringle), Arizona. 



A tree 2i to 30 meters in height, with a trunk sometimes exceeding 0.60 meter in diameter ; rocky ridges and 

 .slopes of almost inaccessible canons between 6,000 to 8,000 feet elevation. 



Wood 'light, hard, not strong, close-grained, compact; bands of small summer cells thin, resinous, not 

 XM)n8picuous, resin passages large, not numerous; medullary rays numerons, obscure ; color, light red, the sap- 

 wood nearly white; specific gravity, 0.4877; ash, 0.26. 



353. Pinus Parryana, Engelmann, 



Am. Jour. Sci. 2 ser. xxiv, 332, note ; Bot. California, ii, 124. Parlatore in De Candolle, Prodr. xvi*, 402. Vasey, Cat. Forest Trees, 30. 



P. Haveana, Torroy, Bot. Mex. Boundary Survey, 208. t. 55 [not Scliiede & Deppe]. Cooper in Smithsonian Rep. 1858, 

 262. Bolander in Proc. California Acad, iii, 318. 



PiSON. NUT PINE. 



California, Larkin's station, 20 miles southeast of Campo, San Diego county ( Vasey), and southward into Lower 

 California. 



A small tree, 6 to 9 meters iu height, with a trunk 0..30 to 0.45 meter in diameter; very rare within the limits 

 of the United States; south of the boundary forming extensive open forests upon the high mesas and slopes of 

 Lower California (Pringle). 



Wood light, soft, close grained, compact; bands of small summer cells thin, not conspicuous, resin passages 

 very numerous, large, conspicuous; medullary rays numerous, obscure; color, light brown or yellow, the sap-wood 

 much lighter, nearly white; specific gravity, 0.5075; ash, 0.54. 



The large seeds edible. 



