40 



BULLETIN 816, V. S. DEPAETMENT OF AGRICULTURE. 



The royal palms, species of Roystonea, are perhaps the most 

 striking ornamental members of the whole gioup. They can be 

 grown in southern Florida and even exist in the wild state in some 

 of the hammocks below Miami. 



PEPPER TREE. 



• The California pepper tree^ is much used in regions 2 and 3 and in 

 the western part of region 5. It is a moderate-sized broad-headed 

 tree with fine foliage, which gives it a light, airy appearance. Dur- 

 ing the fall and winter it is covered with scarlet berries, which in 

 contrast with the persistent foliage produce a pleasing effect. 



P12596HP 



Fig. 28. — A pavement heaved by the roots of poplar trees. 

 POPLAR. 



Poplars are not desirable for street planting. Their wood is 

 brittle and easily broken by ordinary windstorms, and their roots 

 run near the surface and are likely to interfere with pavements, as 

 shown in figure 28, while those of some varieties are especially liable 

 to make trouble in sewers by filling them with a mass of fibrous roots 

 if access is once gained. Vigorous root growth is encouraged by the 

 moisture from a leak, and the roots ultimately find their way inside. 



The southern cottonwood,^ Carolina poplar, and the northern 

 Cottonwood ^ are so similar in their adaptability for street-planting 

 purposes that they will be discussed together. They are easily 

 propagated, easily transplanted, are quick growing, and where they 



^Schinus molle L. 



2 Populus deltoides Marsh. 



Populus virginiana Fouger. 



