4 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 51 



include size of planting area, underground utilities, septic tank 

 distribution fields, and location of walks and other objects. 



Another consideration in selection of species is whether you 

 want trees that produce interesting and attractive foliage (Fig. 

 6), flowers, fruits, or bark. Flowering trees like crabapple, haw- 

 thorn, magnolia, and mountain ash are especially attractive in 

 the spring and provide a distinctive setting for a home. Trees 

 with fruits that attract birds include birch, crabapple, dogwood, 

 hackberry, hawthorn (Fig. 7), mountain ash, mulberry, sassafras 

 (female), and tupelo. 



Trees selected for their attractive foliage color in autumn 

 include those with purple, red, orange, and yellow leaves. Purple 

 foliage develops on white ash and white oak. Red foliage appears 

 on dogwood, hawthorn, tupelo, and several species of oak. Orange 

 foliage appears on sassafras and sugar maple. Although yellow 

 foliage develops on many species of trees, it is more conspicuous 

 on ash, beech, birch, elm, ginkgo, hickory, linden, mountain ash, 

 oak. poplar, redbud, tulip tree, and yellowwood. The leaves of 

 sweet gum may show all four colors — yellow, orange, red, and 

 purple. 



Trees with unusual bark color or formation are especially 

 attractive during the winter. The bark may be green, gray, 

 white, yellow, reddish-brown or mottled. Trees with attractive 

 bark include amur cork tree, beech, birch (Fig. 8), hackberry, 

 Kentucky coffee tree, magnolia, red maple, sycamore, white oak, 

 white poplar, and yellowwood. 





Fig. 6. — Leaf of variegated English elm, showing abundant development 

 of irregular white and light green areas interspersed with normal green. 



