652 



AMERICAN FORESTRY 



seasons, although as a rule its leaves drop more quickly 

 after coloring. It, like the pin oak, is a desirable tree to 

 grow without a visible trunk with the branches resting 

 on the ground. Its branches have a tendency to droop 

 slightly which, with its tendency to form a low head and 

 the denseness of the top, make it a most desirable tree 

 to grow in this manner. It is a medium-sized round- 

 headed tree that is rather undesirable when grown with 

 a tnmk because the dense top makes it almost impossible 

 to maintain a sod under it. 



The tulip tree (Liriodcndron tulipifera) also called 

 tulip poplar and yellow poplar, also has clear yellow fall 

 foliage, but as the leaves drop more quickly after turn- 

 ing than some of the other trees it does not always make 

 as much show in the land.scape as some of the other 

 trees, but it is worthy of planting for its yellow color in 

 autumn. It is one of our largest trees, oval-headed and 

 of rapid growth. It is native from Pennsylvania and 

 southern Ohio and Indiana southward. It succeeds un- 



it the top should die in transplanting, but the root should 

 live and put out a new shoot, it is better to care for this 

 shoot and develop a tree from it than to try transplant- 

 ing another tree, because a root once established will 

 soon grow a new top. With other shade trees, espe- 

 cially the oaks, the reverse is true. 



The foliage of the poplars also turns yellow, but 

 because the leaves of many of them drop so early and 

 because of the many undesirable qualities of the trees 

 for ornamental planting under ordinary conditions they 

 should usually not be considered. They are useful along 

 streams in open meadows on large estates, also in re- 

 gions of small rainfall but for small places in humid 

 climates they should be omitted from the list of desirable 

 trees to plant. 



The yellow fall foliage of the American elm 

 (Ulmus Americana) is also not available for eiTective 

 color combinations because the leaves turn part at a time 

 and drop before most trees begin to color. 



A CLUMP OF SHRUBBERY THAT COULD BE A RIOT OF COLOR IN THE FALL 



The Spirea tliunbergii in the foreground would give a bright yel low and the Philadelphus in the background would also turn 



yellow for a very short time. By the use of sumacs, native roses, Azalea vaseyi and Missouri currant in such a clump reds 



could be added while spice bush would add a good yellow. The elm would be of little value in adding color as its leaves turn 

 part at a time and fall immediately. 



der cultivation considerably north of its native region. 

 On account of its soft, fleshy roots it is somewhat diffi- 

 cult to transplant as it will not stand even as much ex- 

 posure as most of our commoner shade trees. It should 

 be transplanted only in early spring and the chances of 

 success are increased if sizes under eight feet are used. 



The hickories are another group of trees with bright 

 yellow foliage that are decorative in the autumn land- 

 scape. One or another of the numerous species is na- 

 tive in all sections of the eastern half of the United 

 States. Either the pecar\(Hickoria pecan) or the shag 

 bark hickory (Hickoria ovata) can be grown in all of 



