17 



COTTONWOOD (Populus deltoides)A large native tree with trem- 

 bling leaves, found around water courses. It has a shallow extensive 

 root system, suckers badly, and produces considerable "cot-ton," all of 

 which is objectionable in a street tree. It is not a desirable tree for 

 city streets and should be used only in exceptional cases and where plenty 

 of water is available. 



CAROLINA POPLAR (Populus eugenia.)A more desirable tree 

 than the preceding species since it grows faster and has a more regular 

 crown. Useful for quick effects on narrow streets. 



LOMBARDY POPLAR (Populus nigra var. italica)A tall, slen- 

 der, rapid growing poplar used for formal planting on very narrow 

 streets. It is short lived, shallow rooted, liable to send root suck- 

 ers and objectionable because of the "cotton." 



EMPRESS TREE, PRIDE OF INDIA (Paulonia imperaUs)A 

 small, fast growing, Asiatic species with purple flowers. It has large 

 leaves of a tropical appearance and is poorly adapted to planting along 

 streets. 



MESQUITE (Prosopis juliflora) The mesquite is a fairly good 

 shade tree in the southwestern part of the state. It is a rather slow 

 growing tree with an irregular crown of light foliage. Its only advan- 

 tage is that it is very hardy and needs very little care. 



POMEGRANATE (Punica granatum) A small bushy tree suited 

 to the lower coastal region but not especially adapted to street planting. 



OAKS The oaks, as a class, are excellent street trees. They are 

 with a few exceptions strong, well formed, long-lived and not subject 

 to insect attacks. 



WHITE OAK '(Qmrcus alba) A rather slow growing, long-lived, 

 round-headed tree, sturdy, resistant, and cleanly. It makes an ideal 

 street tree where there is plenty of water. * 



BLUE JACK OAK (Quercus cinerea) and BLACK JACK OAK 



(Q. marylandica) Slow growing, short-lived trees of the sand hills, 

 poorly suited for street purposes or lawn planting. 



SPANISH OAK (Quercus digitata)A tree of good form, long- 

 lived, suited to medium or wide streets. It needs considerable moisture. 



TEXAS OAK (Quercus texana) Is similar to the Spanish oak. 



OVERCUP OAK (Quercus lyrnta] , BURR OAK (Q. rrcacrocarpa) , 

 COW OAK (Quercus michauxM], BLACK OAK (Quercus velutina}, 

 and YELLOW OAK (Q. muhlenbergii) are all desirable shade trees. 



RED OAK (Q. rulra) SCARLET OAK (Q. coccinea) are also ex- 

 cellent trees for Northeast Texas. 



WATER OAK (Q. nigra) and WILLOW OAK (Q. pliellos) are fast 

 growing excellent shade trees, but cannot do much on dry sandy land. 



POST OAK (Quercus minor} This is a very slow growing but long- 

 lived species. Much prized on lawns where it occurs naturally, but 



