FOREST TREES AND FOREST REGIONS OF THE U. S. 



29 



Name of tree 



Sandbar willow (Salix 



sessilifolia) . 

 Narrowleaf willow (Salix 



exigua) . 

 Yewleaf willow (Salix 



taxifolia) . 

 White willow (Salix lasio- 



lepis). 

 (Diamond)* willow (Salix 



mackenzieana). 

 (Bebbs)* willow (Salix 



bebbiana). 



Scouler willow (Salix 



scouleriana) . 

 Willow (Salix hookeriana). 

 Silky willow (Salix sitch- 



ensis). 

 Western hop-hornbeam 



(Ostrya knowltonii). 



Paper birch (Betula papy- 

 ri/era). 



Red birch (Betula fonti- 



nalis). 

 Sitka alder (Alnus sinu- 



ata). 



Red alder (Alnus rubra).. 

 Mountain alder (Alnus 



tenuifolia). 

 White alder (Alnus rhom- 



bi folia). 

 Mexican alder (Alnus 



oblonqifolia) . 

 Golden chinquapin (Cas- 



tanopsis chrysophylla). 



Tan oak (Lithocarpus den- 

 siflora). 



California black oak. 

 (Quercus kelloggii). 



Whiteleaf oak (Quercus 

 hypoleuca) . 



Highland live oak (Quer- 

 cus wislizenii). 



Coast live oak (Quercus 

 pricei). 



Coast live oak (Quercus 

 agrifolia). 



Canyon live oak (Quercus 

 chrysolepis) . 



Huckleberry oak (Quercus 

 vaccinifolia). 



Island live oak (Quercus 

 tomentella) . 



Emory oak (Quercus 

 emoryi) . 



California scrub oak 

 (Quercus dumosa). 



Netleafoak (Quercus retic- 

 ulata). 



Tourney oak (Quercus 

 toumeyi). 



Arizona white oak (Quer- 

 cus arizonica). 



Mexican blue oak(Quercus 

 oblongifolia) . 



Evergreen white oak 

 ( Quercus engelmannii) . 



California blue oak (Quer- 

 cus douglasii) . 



Where the tree grows 



Western Washington and Oregon. . 



Western United States 



Western Texas to Arizona 



California, southern Arizona 



Northern Rocky Mountains, Cali- 

 fornia. 



Northern United States, south in 

 Rocky Mountains. (See also 

 p. 10.) 



Western United States 



Oregon and Washington 



Pacific Coast States 



Colorado River in Arizona and Utah 



Northern United States, across the 

 continent. (See also p. 10.) 



Rocky Mountains, Pacific coast 



Northwestern coast States, Mon- 

 tana. Alaska. 



Pacific coast. Alaska 



Rocky Mountain region 



Idaho and Pacific States 



Arizona, southern New Mexico 



Pacific coast region, south to south- 

 ern California. 



California into southern Oregon 



Western Oregon, through moun- 

 tains of California. 



Western Texas to Arizona. 



California, lower mountain slopes 



and foothills. 

 Coast of Monterey County, Calif. ... 



Coastal mountains and valleys of 

 California. 



Southern Oregon, California, south- 

 ern Arizona. 



High Sierra Nevada Mountains of 

 California. 



Islands off coast of southern Cali- 

 fornia. 



Mountains, western Texas to south- 

 ern Arizona. 



California, Sierra Nevada and Coast 



Mountains. 

 Southern parts of New Mexico and 



Arizona. 



Southeastern Arizona 



Southern New Mexico and Arizona- 

 Western Texas to southern Arizona . 



Southern California, belt along the 



coast. 

 Southern half of California, low 



mountains. 



Descriptive notes 



Stamens 2. Leaves small, with stems. 



Leaves white, silky below. 



Leaves 1 inch long. 



Leaves slightly toothed, pale below. 



Leaves 4 inches long, narrow pointed. 



Leaves elliptical, silvery white below. 



Leaves broadest beyond middle. 



Leaves broadly oval, fuzzy beneath. 

 Leaves densely silky below. 



Leaves 1 to 2 inches long, broad, 

 rounded, sharply toothed. Fruit 

 hoplike. 



Bark pure white to light gray, sepa- 

 rating into thin sheets. Leaves thick, 

 rounded at base. 



Bark firm, shiny. Leaves small. 



Flowers opening with or after the 

 leaves. All alders have two kinds of 

 flowers (aments) on same tree. 



Flowers opening before leaves. 



Flowering as above. Leaves thin. 



Leaves broadly oval, rounded at ends. 

 Leaves oblong and pointed. 



Leaves thick, evergreen. Nut in 

 prickly golden burr, ripe in 2 

 seasons. 



Acorn set in flat, hairy cup. Leaves 

 toothed, evergreen, heavily veined. 

 Acorn ripening in 2 seasons. 



Acorn in deep thin cup. (Beginning of 

 the black oak group whose leaves 

 have pointed lobes, if any, and whose 

 acorns require 2 seasons to mature.) 



Leaves hairy below, narrow, acorn in 

 fuzzy cup. 



Leaves thick, shiny, dark green. Acorn 

 deeply enclosed in cup. 



Leaves similar to above. Acorn with 

 saucer-shaped cup. 



Leaves evergreen, thick, with sharp 

 teeth, dull green, 1 to 3 inches long. 



Leaves long, thick, leathery, ever- 

 green. Acorns 2 inches long, in 

 densely hairy cup. 



Leaves small, with smooth margins. 

 Acorn cup mossy. (Often low 

 shrub). 



Leaves 3 or 4 inches long, broadly ellip- 

 tical, toothed, thick, hairy below, 

 evergreen. 



Leaves very shiny, flat, stiff. Acorns 

 shiny black, much used for food. 

 (Beginning of white oak group, 

 whose leaves have rounded lobes, if 

 any, and whose acorns require only 

 1 season to mature.) 



Leaves mostly 1 inch long, with shallow 

 lobes. Acorn broad, in deep cup. 



Leaves coarsely and deeply veined, 

 yellow fuzzy below. Acorn on long 

 stems. 



Leaves tiny. Acorn in thin cup. 



Leaves broad, thick, firm, blue-green. 



Acorn striped, in deep cup. 

 Leaves ellipitcal, blue-green. Acorn 



small, in shallow cup. 

 Leaves resembling the above, or with 



coarse teeth on edge. 

 Leaves blue-green, mostly 2 to 5 inches 



long, deeply notched or lobed. Acorn 



broad above base. Good-sized tree. 



