Trees for Town and City Streets. 9 



ninety -eighth meridian. It is rather uniform in general conditions, the character 

 of soil having no wide divergence and the elevation increasing gradually from 

 south to north and from east to west. The rainfall gradually increases from 

 west to east until at about the ninety-eighth meridian the conditions are more 

 favorable for tree growth. 



The trees to be relied on are the thornless honey locust, common hackberry, 

 black locust, green ash, ash-leaved maple, the poplars, and the Chinese elm. 

 The American elm and the silver maple will frequently prove satisfactory if 

 they can be watered the first few years after transplanting. The mossy-cup oak 

 is another tree worth testing in a small way, as it is native a little east of the 

 ninety-eighth meridian. The bass wood and Norway maple would probably 

 succeed if supplied with plenty of water. 



Region 8. 



Region 8 is the southern part of the Great Plains. 



In addition to the deciduous trees recommended for the northern Great Plains 

 (region 7), the Mississippi hackberry, Texas umbrella, and chinaberry may be 

 successfully grown. 



Evergreen trees that may be used in region 8 are the Texas palmetto and 

 Parkinsonia. 



Region 9. 



Region 9 is the upper Mississippi Valley, including the area eastward from 

 that already considered to Lake Michigan and south to southern Kansas. It is 

 more favorable to tree growth than regions 6 and 7. 



Trees which will succeed here are the American elm ; red, pin, mossy-cup, and 

 other native oaks; white ash; sycamore; basswood; and Norway and sugar 



maples. 



Region 10. 



Region 10 includes the northeastern part of the country from eastern Illinois 

 to the Atlantic Ocean, and extends southward through the Appalachian Moun- 

 tains. It is most favorable for tree growth. 



The best trees for street planting in region 10 are the red and pin oaks, Lon- 

 don plane, sycamore, the staminate form of the ginkgo, basswood, tulip, Nor- 

 way maple, white ash, thornless honey locust, American elm, and in the south- 

 ern portion of the region on light land the sweet gum. The red and sugar maples 

 are among the best trees for suburban conditions. The hackberry will grow, 

 but should be discarded in favor of better varieties. The mossy-cup and chestnut 

 oaks are worthy of trial on gravelly soils in the suburbs. 



Region n. 



Region 11 includes the lower Mississippi Valley and the country east of the 

 southern Appalachian Mountains, extending from the light lands near the South 

 Atlantic and Gulf coasts to the northern limits of the distinctively southern 

 flora. 



The typical street trees of this region are the willow oak (fig. 5) and water 

 oak, the former a valuable street tree, the latter good when young but compara- 

 tively short lived, with no advantages over the willow oak. Other good trees 

 are the red, Spanish, laurel, Darlington, and pin oaks, tulip, sweet gum, Ameri- 

 can elm, red and Norway maples, and the ginkgo. 



Region 12. 



Region 12 is the land near the coast from Wilmington, N. C., to the Mexican 

 border, exclusive of the southern part of Florida. 

 63943 22 Bull. 1208 2 



