5 



only four years yet several new species show promise of being adapted 

 for planting work in the plains region. Prom time to time new trees 

 are sure to be added to the list of those recommended in this bulletin 

 as a result of the Experiment Station work as soon as the tests have 

 been carried on for a long enough period to show conclusively which 

 trees are best suited to each locality. 



SELECTION OF TREES 



Once the property owner has decided to set out trees the question 

 arises: what species should he use? Trees which do well in the Pan- 

 handle will not prove desirable below the cap rock. Trees suitable for 

 planting in wide parkings are poor varieties for narrow streets. In 

 general, long lived trees should be selected. Trees should be chosen 

 which do not sprout up from the roots or have disagreeable odors. Many 

 otherwise admirable trees are untidy because of the quantities of fruit 

 which fall and attract flies. Others lose their leaves early and should 

 be avoided. The natural form should be such as not to necessitate con- 

 stant pruning. Trees for narrow streets should have narrow columnar 

 crowns, such as Lombardy poplar, while wide avenues are adapted to 

 broad spreading species like the American elm and live oak. Cedar 

 trees should not be planted close to apple trees or hawthorns because 

 of the rust which has alternate stages on each of these trees. Black 

 locust is undesirable in regions like Amarillo where the locust borer has 

 become established. It is impossible in a short bulletin to go fully into 

 the qualifications of each tree which might be used in Texas. The fol- 

 lowing table will briefly show trees adapted or suited to varying con- 

 ditions : 



TREES ADAPTED TO NARROW STREETS 



Lombardy poplar Black locust Mesquite 



Silver maple Hackberry Silver poplar 



Tree of heaven Carolina poplar 



Gingko Box elder 



TREES ADAPTED TO WIDE AVENUES 



Oaks Honey locust Willow 



Elm Magnolia . Walnut 



Sycamore Pecan Camphor tree 



Sweet gum Ash Mulberry 



Basswood Cottonwood Russian olive 



Tulip tree Eucalyptus Bois d'arc 



TREES FOR VERY SEVERE CITY CONDITIONS NARROW PARKINGS, OIL, 



SMOKE, ETC. 



Tree of heaven Sycamore 



European plane tree Gingko 



SHORT-LIVED TREES 



Poplar Silver maple Hackberry 



Chinaberry Box elder Black locust 



