Handbook of Trees of the Noktheen States and Canada. .13 



The Jack Piiif attains its gi-oatost size in 

 tlie northwestern |)art uf its ranj^c, u liere it is 

 often 70 or 80 ft. in height wiUi trunk 2 nr :i 

 ft. in diameter, and forms fnii',ts uf con- 

 siderable e,\tent. Tlirijiif.'liiint (lie ca.^tcrn |iait 

 of its range, hu\\c\cr, it is nmcli less aljundant 



and more redm-i'd in stature, co only tlii'oH'- 



in{,' out its lirani'hes ininiciliatcdy al)0\e tlie 

 ground as shown in our liaik |ucture. its 

 sliort needles and small cones incur\'ed npon 

 the branchlets .|nirkly distinguish it from all 

 of its neiglihors. It dc\elo|is a ratlier sym- 

 metrical opi-ii to|i of straightish hranchcs and 

 tough llcxihli' hranelilets and its trunl<: is 

 vested ill a dark rcililish hrown hark rougli 

 witii iriegulai- scaly jilates ami ridges. 



The wood, of wliich a cubic foot \\hcn abso- 

 lutely ilry weighs ■I'.l.i'u llis., is light, soft, not 

 strong, and id' a reddisli lu-own color «-ith 

 thick lighter sap-woiKl. It is used foi- fuel and 

 occasionally for railway lies, |i(]sts and luniljer.- 



Lcares In remele ch-istcrs of 2, % to 1 Mj in. 

 long, stout, sin'eaiUn:;-, more or less curv<'d and dis- 

 tributed aInn.L,' I lie hrancldet, witlj li iibro-vascular 

 bnndle.s and ri'sin-ducts within the parench.vina. 

 Flowers: staminate yellow, in crowded clusierw ; 

 pistillate dark pui'idc, singly oi- few together and 

 occasionall.v cliislci's on same stioot. t-'o/tc.s small, 

 IM;-- in. Ion'.,', pointed and strongly incurved, 

 narrow conical-o\'nid, ol)Iif|ne at base, sessile and 

 scales thickened at ape.x and furnished with a 

 weak in(aii'\'cd m- deciduous prickle ; seed rounded, 

 triangular, n-'arly black and with full wing about 

 ' K in. leng and widesi near the middle. 



1. Syn. P. Banksiana Lamb. 



2. A, W., IV, 09. 







'mW 







