SHADE, LAWK, AND PARK TREES. 



:3;57 



foliage lasts late in autumn. The heavy loads of fruit 

 are also ornamental as well as useful. 



323. Mountain-ash Family, — The European mountain- 

 ash {Sorbus aucuparia) is a desirable tree for giving variety 

 of expression on the outer edge of groups, and the same is 

 true of the American species [Sorlus Americana). The 

 latter, as obtained from the upper lake region, is a round- 

 topped handsome small tree that loads with bright-colored 

 fruits, even more freely than the European. It is also 

 much hardier than the foreign species in the Northwest. 



The oak -leaved mountain-ash {Sorous quercifolid), Fig. 

 93, is more regular in form and for certain positions is more 



Fig. 93.— Oak-leaved mountain-ash (Pyrus aucuparia quercifoUa). 

 (After Maynard. ) 



ornamental than either of the above, but is not so hardy as 

 the American species. The white beam tree {Pyrns aria) of 

 west and east Europe is closely related to the mountain-ash 



