790 PINAt'Ei*' picea 



PINUS 



tips, slender, nearly straight on sterile branchlets, incurved and stouter 

 on fertile ones, 1-134 inch, long, dark blue-green at maturity: staminate 

 flowers oblong cylindrical, a!>out 7 lines long, 4 lines thick, the stipe about 

 4 lines long: anthers dark purple: cones oblong-cylindrical to ovate, 1-3 

 inches long, gradually narrowed to each end: scales thin, straight, usually 

 erose-dentute: seed nlack, about half as long as the broad very oblique 

 wing. In wet places on the high mountains, Oregon to -Brit. Columbia 

 and the Rocky Mountains. 



P. Sitcheusis Can- C nit". 2^„ A very large tree, 20<i-3on feet high 

 and 4-12 feet in diameter with thin scaley red -brown bark • branchlets thick, 

 rough with the prominent persistent leaf bases, glabrous: leave? 5-8 lines 

 long, about 1 line wide, fattened, short-pointed or obtuse to acute, stomatose 

 and when young white on : lie upper surface: cones cylindrical-oval, l%-3 

 ii ches long an inch thick or less: bracts la ceolate, rigid %-% as long as 

 the scabs: scabs yellowish, oblong soft, rounded and denticulate at the 

 apex, Q-l:> lines long: st-ecis slender l%-\% lines long, the wing 4-5 lines 

 Jong by \~\% lints wide, narrowly oblong or slightly oblique. Along the 

 coast California to Alaska 



11 PINTS L, Sp, IjU). 



Kv^-green trees of vari >us sizes mid aspect, with flaky bark 

 and monoecious flowers. 1 r'mary leaves only on young plants 

 and shoot-, Hat. subulate and serrulate: the secondary in bundles 

 of 1-5, from tl e axils of bud-scales an 1 surrounded at base by a 

 nioieor less peisist'-n't sheath of membranous, scales, needle-shaped, 

 terete, semitetete or triangular according as bundles are of 1 or 

 more, mostly delicately serrulate, with stomata on all sides: 

 resin-dmts various in situation .-111(1 number. Staminate aments 

 an oblonlr Oi* cylindrical often much elongated stamina! column 

 surrounded by a somewhat definite number of calyx-like bud- 

 scales, the o iter ones lateral and strongly keeled, from the axils 

 of scales and crowded into a capitate or spicate inflorescence 

 around the base of the same springs growth: anther- cells open- 

 ing longLudinally. the connective terminating in a knob or semi- 

 circular erect crest. Pollen-Brains rather small, '2-lobed, with 2 

 air sacs. Pistillate aments axillary or subterminal, solitary or 

 several together, the. scales much larger than the bracts. Cones 

 maturing the second year, scales more or less thickened and 

 corky, the free exposed portion bearing a terminal or dorsal un- 

 armed or prickly protuberance (umbo). Seeds without resin- 

 vesicles, usually surrounded by the rim-like base of the wing 

 which often spreads partly over the outer side of the seeds. 

 ( olytedoss 5-15. 



§ 1 Leaves in fives with peripheral resin ducts their sheaths 

 loose and deciduous. Cones subterminal. Scales comparatively 

 thin at the free exposed apex, with a terminal unarmed umbo. 

 Anthers terminating in a knob or a few teeth, or in a short in- 

 complete crest. 



P. Lambertiana Dough Linn. Trans, xv, 5b0. A large tree 100-300 

 feet high and 5-20 feet in diameter, with light brown smoothish bark and 

 spreading branches: leaves 3-4 inches long, rigid, with 5 or 6 lines of stomata 





