62 SHADE TREES. 



rapidity. Against these recommendations must be set its 

 susceptibility to insect and fungus attack, the early fall of 

 its leaves, the litter produced by its fruit and the liability 

 to injury by reflected heat when planted on sunny streets. 

 A tree of undoubted value for parkways and lawns, but it 

 should be used with discrimination in other situations. One 

 or two native horse chestnuts, or buckeyes, especially A. 

 glabra, Wild and A. odandra, Marsh., are also sometimes 

 planted. 



LOCUST. 



Common, black, or yellow locust (Robinia pseudacacia, 

 L.) is so subject to injury by the borer worm (see page 83) 

 that it should never be planted in this part of the country, 

 either along the streets or on lawns. This is unfortunate 

 because the light foliage and narrow form of the crown, 

 with the hardiness and adaptability of the tree, make it an 

 admirable one for street planting. Honey locust (Gleditsia 

 triacanthos, L.), however, is less apt to be injured in this 

 way. The tree is very hardy, not particular about the soil 

 in which it stands, and a fairly rapid grower. Apart from 

 the beauty of the foliage, which is unusually light and open, 

 the flowers are full of honey and the stout thorns with which 

 the trunk and branches are clothed make it particularly at- 



Fig. 30. Trees left above grade. If others are planted at x, x, x, the old 

 ones can be removed in a few years without injuring the property. 



