Trees for T'owh'dnd 'C<v 



Norway, sycamore, and English maples; white, green, and European ashes; red, 

 English, and pin oaks ; European linden ; basswood ; California walnut ; honey 

 and black locusts ; horse-chestnut ; ^.Ibizzia ; and the Japanese varnish tree, or 

 Sterculia. 



Evergreen trees which will succeed in region 2 are the Eucalyptus in variety, 

 acacias, rubber, magnolia, California live oak, Victorian and poplar-leaved bottle 

 trees, and in the southern portions the California pepper, silk oak, and jaca- 

 randu. Palms are much planted, but they do not make good street trees except 

 where a formal effect instead of shade is desired. 



Region 3. 



Region 3 comprises the Sacramento and San Joaquin Valleys. 



The deciduous trees for this region are the California walnut ; London plane ; 

 California and common sycamores ; Oregon, Norway, and sycamore maples ; 

 white, European, and green ashes ; red, English, valley, and pin oaks ; European 

 linden ; basswood ; Eng- 

 1 ish and Huntingdon 

 elms ; honey locust ; and 

 horse-chestnut. China- 

 berries and Texas um- 

 brellas are much planted 

 in these valleys, but are 

 not good street trees. 

 Olives and palms are 

 suitable only for formal 

 effects. Eucalypti are 

 satisfactory but are liable 

 to make trouble with de- 

 fective sewers. Acacias 

 grow especially well ex- 

 cept in the extreme north- 

 ern part of this region. 



Region 4. 



FIG. 3. Formal trees in a central parking, but appro- 

 priate trees wanting on the sides of the street. Canary 

 Island date palms in Merced, Calif. ; midsummer. 



Region 4 includes the 

 country from the Sacra- 

 mento and San Joaquin Valleys to the crest of the Sierra Nevada Mountains. 

 It varies in elevation and correspondingly in temperature and the amount of 

 available moisture. 



Where the moisture is sufficient the deciduous trees recommended for region 

 3, except the valley oak and possibly the California sycamore, may be used. 

 Where there is less moisture, the thornless honey locust, black locust, green ash, 

 hackberry, poplars, ash-leaved maple, and the American elm if it can be 

 watered the first few years may be planted. In the warmer sections the china- 

 berry and Texas umbrella may be used. 



Region 5. 



Region 5 comprises the hot semiarid country of southern California and 

 southwestern Arizona, which is dependent on irrigation. 



The best deciduous trees for this region are those suggested for the drier 

 portions of region 4. With ample irrigation the deciduous trees recommended 

 for region 3 might grow. 



Among the evergreens the Texas palmetto, Parkinsonia, and the Washingtonia 

 and some other palms can be used where other trees do not succeed. The red 



