. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE. m BULLETIN No. 327 mm wjgt „ k L——. WSM" Contribution from the Forest Service HENRY S. GRAVES, Forester S&9*^L Washington, D. C. PROFESSIONAL PAPER February 19, 1916 THE SPRUCE AND BALSAM FIR TREES OF THE ROCKY MOUNTAIN REGION. By George B. Sud worth, Dendrologist. CONTENTS. Scope of the bulletin 1 Generic characteristics of spruces 2 Black spruce Picea mariana (Mill.) B., S., & P 3 White spruce Picea canadensis (Mill.) B., S., & P 6 Engelmann spruce Picea engel
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE. m BULLETIN No. 327 mm wjgt „ k L——. WSM" Contribution from the Forest Service HENRY S. GRAVES, Forester S&9*^L Washington, D. C. PROFESSIONAL PAPER February 19, 1916 THE SPRUCE AND BALSAM FIR TREES OF THE ROCKY MOUNTAIN REGION. By George B. Sud worth, Dendrologist. CONTENTS. Scope of the bulletin 1 Generic characteristics of spruces 2 Black spruce Picea mariana (Mill.) B., S., & P 3 White spruce Picea canadensis (Mill.) B., S., & P 6 Engelmann spruce Picea engelmanni Engel- mann 10 Blue spruce—"Colorado blue spruce" Picea parryana (Andre) Gardeners' 14 Generic characteristics of balsam firs 17 Balsam fir Abies balsamea (Linn.) 20 Generic characteristics of balsam firs— Continued. Alpine fir A bies lasiocarpa (Hook.) 24 Cork fir A bies arizonica Merriam 27 Grand fir—"White fir" Abies grandis Lind- ley 29 White fir A bies concolor (Gord.) Parry 33 Shasta red fir Abies magnifica shastensis Lemmon 38 Key to genera 42 Key to Picea 42 Key to Abies 43 SCOPE OF THE BULLETIN. This bulletin deals with the distinguishing characters, geographic distribution, and forest habits of all of the spruce and balsam-fir trees that grow naturally within the Rocky Mountain region, which roughly includes the desert and mountain territory lying between the Great Plains and the eastern border of the Pacific Slope States. Canadian territory lying directly north of our Rockies and Mexican territory adjacent to our Southwest are included, because the ranges of some of the spruces and firs extend into these regions. The method of treating the subject, sources from which data on the geographic range were obtained, and the origin of other information used in this bulletin are fully discussed by the writer in a recently issued publica- tion on the " Cypress and Juniper Trees of the Rocky Mountain Re
Size: 1670px × 1496px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
