tsuga PINACEiE 789 



PICEA 



the axis. Seeds with resin-vesicles on the surface, winged. 



T. hetcrcpkyUa Saigent. Abies heterophylla Raf. Tsuga Mertensiana 

 <f authors not of Carr. A very large tree 100-20o leet high and 2-6 feet 

 in diameter, with rough rather thick ba k: ultimate branchlets very slender, 

 roughish and when young long-hairy: leaves linear, 4-9 lines long, abruptly 

 petioled, entire or usually spin u lose- serrate toward the rounded apex, shining 

 above, when youn^ with 2 white stripes beneath: staminate flowers 2-3 lines in 

 diameter, shorter than the stipe: cones oblong-cylindrical, acute, 4-9 lines long, 

 slightly pubescent: scales longer than wide: bracts truncate: seeds about 1 line 

 long, the wing twice as long: cotyledons 2 or 4. In moist places in forests, 

 California to Alaska. 



T. Mertensiana Can-. Coi if. ed. 2, 25J T. Pattonian" Engelm. \ 

 large tree 100-200 feet high and 1-4 feet in diameter, with rough dark brown 

 bark, slender pubescent branchlets aud and dark green foliage: 'eaves 6-12 lines 

 long, angular, acutish, attenuate at the base, often curved, stomatose and keeled 

 both sides, unequal and appearing asii'iu fascicles: staminate flowers about 2 

 lines thick, on a very slender stipe: cones cylindrical- oblong 2-3 inches long. 

 6-8 lines iu diameter: seeds 2% lines long, with an obliquely obevate wing 

 about 4 lines long. On the high mountains California to Alaska. 



10 PICEA Link Abb. Akad. Wihb. Iterlin 1727, 179. 



Large evergreen trees with i eddish flaky bark and spreading 

 branches. Leaves keel, d above and beneath, more «r less quad- 

 rangular, articulated on a proii ii ent. al hist ligneous, | ersi^tenr 

 rhombic base, spirally ananged all around tl.e branch-lets, some 

 times by a twist of the base somewhat 2- ranked: resin-dueis 

 irregular. Staminate flowers ; ; xi lary and terinii al on the previ- 

 ous year'.- branchlets. with an obJong or cylindrical -tmiia! 

 column, its short stipe stirroun ed I -y numerous bud-seales: ihe 

 commissure of the anthers expanding into a broad nearly eiivular 

 erect crest: anther-cells opening longitudinally. I', Hen grains 

 large, with 2 air-sacs. Pistillate aments borne ; t ih<- ends of 

 short or longer h and lets, the scales miuli longer i ban t' e br cts. 

 Cones maturing the first year, pendulous: scales and enclosed 

 bracts persistent upon the axis. Seeds without resin-vesicle-., 

 imbedded in the membranous b s< of tl e w im wb c.h 1 avs its 

 under side nearly free arid permits it to fall on;. ioJyledons 4-8. 



P. Breweriana Watwm ! roc. \m. Acad, xx 37S. A slender nee 

 100-150 feet high and 2-4 feet in diameter, with spreading or ascending bran- 

 ches and puberulent pendent branc hlets. these sometimes 0-8 feet, long and not 

 more than 4 lines in 'diameter: leaves 5-li lines long, strictly sessile upon the 

 slender base, obtuse, smooth and rounded or slightly ruinate above, stomatose 

 beneatli on each side of the slightly prominent niidnerve: cones 2-4 inches 

 long, 8-10 lines in diameter, narrowly cylindrical, atteuuate at base: bracts 

 linear-oblong, 2 lines long: scales thick, puberulent, obovate. with slightly 

 thickened rounded summit, entire, 6-8 lines long: seeds 1*4 lines long, the 

 wing 4 lines long, '1% lines wide. On dry rocky ridges in the Siskiyou and 

 Coast Mountains of southern Oregon and adjacent California. 



P. Eugelinainii Engelm. I rans. -t. Lotus Acad, ii 2 2 A tree 100- 



150 feet high and 2-5 feet in diameter with cinnamon colored bark and spread- 

 ing branches with pubescent branchlets: leaves soft and tlexihle. standing out 

 in all directions from all sides of the branchlets, tetragonal, acute, with callus 



