150 LANDSCAPE GARDENING 



use in gardens or near houses the odor must be 

 taken into consideration, whether it be agreeable 

 or unpleasant. Though the ailantus-tree is very 

 decorative, care should be taken not to select the 

 staminate form for use near the house, on account 

 of the very disagreeable odor of the male buds. 



The most interesting feature of a tree may lie in 

 its twigs, because of their color or direction. Tliis 

 is vertical in the poplars, angular in the elm, hori- 

 zontal in the Cratcegus or the tupelo, and drooping 

 in the weeping-willow and other trees of the type. 

 Twigs may be slender, as in the acacia, or coarse, 

 as in the Kentucky coffee-tree. The shape of the 

 twig may attract. In the maple it is round, in the 

 blue ash (Fraxinus quadrangulata) square, and in 

 the Euonymus alatiis triangular. The length of 

 the twigs between branching is often marked, as in 

 the ailantus or the elm. 



Fruit characteristics have two phases, the eco- 

 nomic and the esthetic. Each is affected by sea- 

 son, size, and color. The apple, cherry, pear, and 

 plum are examples of economic fruit. The burn- 

 ing bush and the snowberry (Fig. 35) illustrate 

 the decorative type. We may also have a combi- 

 nation of the practical and the esthetic, as in the 

 common barberry and high-bush cranberry. The 



