790 PINACBiE picba 



PIND8 



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

 on fertile ones, l-lJi inch long, dark blue-green at maturity: staminate 

 flowers obiong-cvlindrical, about 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 

 erbse-dentate: seed black, about half as long as the broad very oblique 

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

 and the Kocky Mountains. 



P. Sltchensis Carr. Canif. 260 A very large tree, 200-300 feet high 

 and 4-13 feet in diameter with thin scaley red -brown bark : branchlets thick, 

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

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

 and "when young white on the upper surface: cones cylindrical-oval, lJ^-3 

 inches long, an inch thick or less: bracts lanceolate, rigid J^-M as long as 

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

 apex, 9-12 lines long: seeds slender 1J^-1>^ lines long, the wing 4-5 lines 

 long by 1-lM lines wide, narrowly oblong or slightly oblique. Alongt he 

 coast California to Alaska. 



11 PINUS L, Sp. 1000. 



Evergreen trees of various sizes and aspect, with flaky bark 

 and monoecious flowers. Primary leaves only on young plants 

 and shoots, flat, subulate and serrulate: the secondary in bundles 

 of 1-5, from the axils of bud-scales and surrounded at base by a 

 more or less persistent sheath of membranous scales, needle-shaped, 

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

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

 resin-ducts various in situation and number. Staminate aments 

 an oblong or cylindrical often much elongated staminal column 

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

 scales, the outer 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 longitudinally, the connective terminating in a knob or semi- 

 circular erect crest. Pollen-grains 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 frefe 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. 

 Colytedoss 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 Dougl. Linn. Trans, xv, 500. 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 



