130 MASS. EXPERIMENT STATION BULLETIN 170. 



time of transplanting. The foliage of the red maple is inferior to that 

 of the rock maple both as regards color and density. This species has 

 suffered much from drought and winterkilling of roots, which is character- 

 ized by a "staghead" condition. The leaves are often conspicuously 

 spotted by the fungus Rhytisma. 



NORWAY MAPLE (Acer platanoides) . The Norway maple is a wide- 

 spreading tree, with large leaves which give a dense shade. It is well 

 suited to lawn planting, and is highly regarded for streets and roadsides. 

 The Norway maple is perhaps at the present day one of the most exten- 

 sively planted street trees, especially in cities. It is a rapidly growing 

 tree, and, at least when young, is very symmetrical and well adapted to 

 city conditions. However, whether the Norway maple will in the long 

 run prove equal to the rock maple as a shade tree under severe city -con- 

 ditions is a question. When planted in unfavorable locations it is some- 

 times badly affected with sun scald, and the small terminal branches 

 sometimes winterkill and become affected with the cinnamon colored 

 fungus Nectria. 



WHITE OAK (Quercus alba). This species is seldom planted as a 

 street tree because of its slow growth. Its habits of branching are not 



always well adapted to streets, 

 although it makes magnificent in- 

 dividual specimens for lawns and 

 roadsides. It is occasionally 

 affected by a leaf fungus (Glceo- 

 sporium) and by various insects, 

 and is one of the preferred food 

 plants of the gypsy moth. 



RED OAK (Quercus rubrd) . 

 In former years little considera- 

 tion was given to the red oak as a 

 street or ornamental tree, although 

 recently it has received much well- 

 deserved attention. At present it 

 ranks among the first as a species 

 possessing all the required qualifi- 

 cations for planting. The growth 

 of the red oak is quite rapid; it is 

 symmetrical and clean in appear- 

 ance and exceptionally free from 

 injury resulting from insects, fungi 

 and other causes. It is adapted 

 to a variety of soils, quite easily 



transplanted, and should bo moro extensively used as a street and country 

 roadside tree. 



BLACK OR YELLOW OAK (Quercus velutina). This oak is often found 

 associated with the red oak, but will tolerate much drier soils. It does 



;. 5. Specimen of red oak. 



