ELEMENTS OF LANDSCAPE DESIGN 17 



Horticulture may be divided into two classes, 

 the economic and the decorative. The decorative 

 aspect is of chief importance to the landscape-de- 

 signer, as the economic side appears only in such 

 problems as the disposition of orchards and the 

 screeniag of objectionable features. This last 

 consideration is nevertheless of as much impor- 

 tance as the first, and is as much a question of es- 

 thetics as of economics. 



The ornamental side of horticulture deals with 

 all the plant materials used in landscape-garden- 

 ing. The horticulturist groups these according 

 to methods of growth, and classifies them according 

 to size and soil requirements; but the landscape- 

 architect primarily considers them with regard to 

 form and color. Horticulture gives the land- 

 scape-architect the majority of the materials with 

 which he has to work, for he is generally called in 

 where planting is to predominate, and he must ac- 

 cordingly be thoroughly familiar with it. 



ENGINEERING 



Engineering in landscape problems concerns 

 the lay of the land, the alteration of grades, the 

 construction of topographical work, drainage, and 

 the building of walks, bridges, and drives. Be- 



