320 Trees for Shade and Ornament 



T. argeniea, D. C. (338), the European Silver Linden, with silvery 

 under-side of leaves, is of highly ornamental value for color effect. 



T. dasystyla Stev. (338 bis) (euchlora), from the Crimea and other 

 parts of Asia and Eastern Europe, is most distinctive, with tough leath- 

 ery leaves, dark glossy above, lighter green below, fit for planting along 

 dusty roads, as it is not affected by the dust. It is hardy in Ottawa. 



There are several varieties, with red and yellow twigs and variously 

 shaped leaves. 



OSAGE ORANGE 



Toxylon. T, pomifenun Raf. (339) {Madura aurantiaca), a small 

 round-headed tree, of southeastern range, but acclimated all through the 

 East, and hardy in New England, is, outside of its value for hedges, 

 for which it is admirably adapted, mainly of botanical interest for its 

 shiny, rather coarse, bright green leaves, its large, orange-shaped, yel- 

 lowish-green fruit, its yellow-tinted bark, and thorny tangle of branches. 

 It might be used advantageously for a lawn tree on small plots, where, 

 by proper pruning (annually heading it back), it may be trained into 

 a gigantic, round bush of striking appearance. It is adaptive to various 

 soils, a rapid grower, without insects or other troubles. 



ELMS 



Ulmus. A genus with eighteen species of world-wide, mostly north- 

 em distribution, and a large number of varieties or forms. Tall to 

 medium-sized trees and shrubs, as a rule pleasing in outline and branch 

 habit, with simple but luxuriant foliage of long leaf period, without 

 striking autumn features (pale yellow). They are adaptive to various 

 soils, but prefer rich, well-watered soils, even swamps; are moderately 

 shade-enduring and readily transplanted. Aside from the fact that 

 they are subject to many insect troubles, leaf destroyers, scale, borers, 

 and fungi, they are otherwise among the best lawn trees and shade 

 trees, but should always be given ample space to permit the develop- 

 ment of their characteristic form. 



U. Americana Linn. (340), White Elm, the finest in form, is the best 

 known and most popular native species, especially when it develops its 

 unique, vase-shaped, broad-topped, over-arching crown with gracefully 

 drooping branchlets. It is, however, often very variable in form, but 

 always vigorous and courtly in appearance, with wide-spreading crown 



