LOJIBARDY POPLAR. 



209 



root freely, and are fit to be moved to permanent stations 

 after one or two years' growth, but to ensure a large 

 and rapid-growing tree it must be planted in soil of more 

 than ordinary quality. The specific characters are, — disk 

 of leaf deltoid, wider than long, the whole of the edge 

 from the base crenulated, glabrous on both surfaces, petiole 

 compressed. The leaves are the food of various lepidopte- 

 rous caterpillars, among which are those of Smerinthus po- 

 puli, Cerura vinula, and furcula, and some of the Notodon- 

 tidse. 



