282 LANDSCAPE-GARDENING 



teach, a small part even of those who are interested 

 in landscape-gardening. The United States is so 

 vast in extent, it has so many variations of soil and 

 climate and its people live so far apart that it should 

 have more than one arboretum. Other experiment 

 stations and government plantations in various sec- 

 tions of the United States are doing good work, but 

 more arboretums devoted especially to planting 

 material suitable for landscape work are greatly 

 needed. There should be at least a great compre- 

 hensive arboretum for the central northern part of 

 the United States, one or more for each of those sec- 

 tions known as the Rocky Mountain region, the coast 

 and the southern states. Even with arboretums in 

 the localities named, these should be supplemented 

 by plantations at universities, especially where land- 

 scape-gardening is taught, and in the parks of the 

 various cities. An individual who wishes to develop 

 beautiful home grounds should be able to see and 

 become acquainted with the available planting 

 material for this purpose in the parks of any 

 neighboring city. In the latter especially, one 

 should have an opportunity of judging the effects 

 of different trees and shrubs in landscape work. 

 For their educational value, labels giving names, 



