SHADE, LAWN, AND PARK TREES. 337 



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 (Sorbus 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 (Sorons qnerci folia), Fig. 

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



FIG. 92. Oak-leaved mouutain-ash (Pyrus aucuparia quercifolia,) 

 (After Mayiiard. ) 



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

 the American species. The white beam tree (Pyrus aria) of 

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



