DESCRIPTION OF TREES. 157 



with ash-like foliage and fruit much like that of the com- 

 mon maples. It soon takes an irregular form, is easily 

 broken by wind or ice, and is rather short-lived. 



CHINESE CORK-TREE (Pliellodendron amurense). A 

 very desirable round-headed tree of recent introduction 

 with foliage somewhat like the black walnut. Thus far it 

 has proved clean and free from insects and disease. 



YELLOW LOCUST (Robinia pseudo-acacia). Were it not 

 that this tree is attacked by insects which injure the 

 branches, stopping their growth and causing the growth of 

 suckers from the roots, it would be a great addition to the 

 list of beautiful ornamental trees. Its foliage is fine and 

 feathery, of a rich dark green color, and when in blossom 

 we have no more beautiful tree. It is worthy of continued 

 effort to find a remedy or preventive for the injury of 

 insects, and it has been suggested that by spraying the 

 trunk and main branches with Paris green and water or 

 with this substance in the Bordeaux mixture, in the spring 

 and early summer, this injury may be prevented. 



WILLOWS. Like the poplars, the willows are easily 

 propagated by cuttings and will grow in almost any soil. 

 They grow very rapidly, but soon reach maturity and are 

 not of much value for permanent growth. Some of the 

 weeping varieties are graceful and very ornamental and will 

 be described under the head of Weeping Trees. 



WHITE WILLOW (Salix alba). The most rapid grower of 

 all of the willows and often used to hold embankments and 

 the soil along the borders of ponds and streams in place. 

 While young it is regular in form and ornamental, but as it 

 becomes older takes a more irregular growth and loses much 

 of its beauty. 



GOLDEN WILLOW (8. a., var. vitettina). Of the same 



