102 LAWN AND SHADE TREES. 



varieties with varied foliage as well as flowers, render the plan 

 of grafting two or more of a kind on the same stem a very 

 desirable one, especially in small grounds where only room can 

 be given for a few plants. 



The HORSE-CHESTNUT Pama. The dwarf horse-chestnut 

 pavia macrostachya is one of the finest low-growing shrubs. 

 There are two varieties, one with white and one with variegated 

 or red flowers, both forming spikes large and showy in July 

 and August. The plants form bushes as it were, often spreading 



FIG. 51. DWABF HORSE-CHESTNUT. 



many feet wide, but seldom rising above four to six feet in 

 height. 



The HOP TREE Ptelea. A few years since the ptelea trifoliata 

 or trefoil tree acquired a general although transient reputation 

 as a plant to grow for the value of its seed capsules, as substi- 

 tutes for hops, and under the name of hop tree thousands were 

 sold. As an ornamental low tree when trained to a single stem 

 it is very pretty and desirable for planting in the foreground 

 of groups. 



The HYDRANGEA. Most of the hydrangeas require protection 



