Important Forest Trees of the United States 



813 



162. Blue oak. 



163. Oregon white oak. 164. California 



white oak. 



165. Gambel oak. 



aa. Leaves with lateral veins not parallel (except in No. 161), falling in 

 autumn or evergreen; scales of acorn cup small and inconspicuous OAK 

 (Quercus) . 



b. Leaves with bristle-tipped teeth; acorns maturing the second year (first 

 year in No. 159) BLACK OAKS. 



158. CALIFORNIA BLACK OAK, Quercus kelloggii Newb. (black oak; Q. calif ornica 

 (Torr.) Coop.). 



Large tree of Oregon and California. Bark dark brown, furrowed into irregular plates 

 and ridges. Leaves falling in autumn, oblong, 4 to 10 inches long, usually 7-lobed about 

 halfway to middle, each lobe with a few bristle-pointed teeth, thick, dark yellow green and 

 smooth above, light yellow green and smooth or hairy beneath. Acorns 1 to 1 /a inches long, 

 rounded, with deep cup. 



Principal uses: Fuel. 



159. CALIFORNIA LIVE OAK, Quercus agrifolia Nee (coast live oak). 



Large tree of California and Lower California. Bark dark brown, thick, deeply fur- 

 rowed. Leaves evergreen, elliptical to oblong. ^4 to 3 inches long, short-pointed or rounded 

 at tip, spiny-toothed, thick and stiff, dark green above, beneath paler, shiny, and smooth 

 or hairy. Acorns long, % to 1 / 2 inches long, pointed, with deep cup. 



Principal uses : Fuel. Shade tree and ornamental. 



bb. Leaves lobed, toothed, or entire but not bristle-tipped; acorns maturing 

 the first year (second year in No. 161) WHITE OAK (see also Nos. 

 103 and 107). 

 c. Leaves not lobed or only shallowly lobed. 



160. EMORY OAK, Quercus emoryi Torr. (black oak). 



Medium-sized tree of Southwestern region and adjacent Mexico. Bark blackish, divided 

 into thin plates. Leaves evergreen, broadly lance-shaped, 1 to 2 l /2 inches long, short- 

 pointed, with a few short teeth, thick, stiff, leathery, flat, shiny dark green on both sides, 

 nearly smooth. Acorns J/a to ^4 inch long, rounded, edible. 



Principal uses: Fuel. 



161. CANYON LIVE OAK, Quercus chrysolepis Liebm. (live oak, maul oak; variety: 

 Palmer oak, Q. chrysolepis var. palmeri (Engelm. ) Sarg. ). 



Medium-sized to large tree (a variety is shrubby) of Pacific coast and Southwestern 



