748 Mr. Douglas on a new Species 



branches to the ground, when standing far apart or solitary. 

 Some few I have measured 140 feet in length, but never any 

 larger in circumference than that just cited. 



The largest and most handsome trees inhabit the alluvial 

 deposits on the western flanks of the Cordilleras of New Al- 

 bion, at a very great elevation above the level of the sea, being 

 1600 feet below the range of perpetual snow in the parallel of 

 40° N. On the less elevated mountains near the coast, where 

 the temperature is higher but more uniform, in the parallel of 

 37° N. in decomposed granite, schist, or gravelly soils, the 

 trees are smaller and fewer, inhabiting the summit of. the moun- 

 tains only. 



The wood is white, soft, coarse-grained, and, I think, not very 

 durable. A copious transparent resin issues from the wounds. 

 Leaves in threes, very rarely in fours, 11 to 14 inches long, con- 

 vex and smooth on the underside, channelled above, with an 

 elevated ridge, pointed, and furnished at the margin with mi- 

 nute teeth, which become more distant and conspicuous towards 

 the extremity ; erect in summer ; flaccid and drooping during 

 winter. Sheath 1*5 inch long, light brown, chaffy, and torn at 

 the top. Stipule lanceolate, rigid. Male and fetnale calkins erect. 

 Cone (which abounds in pellucid resin) ovate, recurved, pressing 

 on the branch for support, 3 to 9 in number, surrounding the 

 same stem, persistent, and remaining on the tree for a series of 

 years, like P. Banksiana ; 9 to 11 inches long, 16 to 18 inches 

 round. Scales spathulate, 2"25 inches long, having a very strong, 

 sharp, incurved point, which near the base exceeds the length 

 of the scale. Seed somewhat oblong, tapering to the base, flattish 

 on the inside, •875 inch long, nearly '500 inch broad. Shell 

 thick, hard, brown. Wing short, stiff, one fourth the length of the 

 seed, which it nearly encompasses. Ker7iel pleasant. Cotyledons 

 7 — 12 in number. 



The 



