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ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 51 



Fiff. 102. — The 

 rapid -growing tree 

 of heaven produces 

 sparse shade and 

 frequently produces 

 root suckers that are 

 troublesome in 

 lawns. Each large, 

 plumelike leaf (in- 

 set) is composed of 

 11-41 leaflets. 



seeds, li/o inches long, are conspicuous in late summer and fall. 

 The smooth to rough gray bark has pale stripes formed by shallow 

 fissures. 



This tree is relatively free of insect pests. An occasional tree 

 is affected by Verticillium wilt, and the foliage of some trees may 

 show scorch during late July and August. Although the wood is 

 soft, weak, and coarse grained, the tree is seldom damaged by 

 wind and ice. Since the wood is not durable, it is not used com- 

 mercially. 



Tulip Tree 



Tulip tree (Liriodendron tuUpifera) (Fig. 103) is frequently 

 called yellow poplar and is sometimes referred to as saddle tree, 

 canoewood, whitewood, or blue poplar. It is recommended for 

 ornamental and shade purposes throughout Illinois, although its 

 natural range extends northward only to St. Clair County in the 

 west and to Vermilion County in the east. It grows rapidly and 

 thrives on moist, well-drained soils. Tulip tree normally reaches 

 a height of 80-100 feet (occasionally 150 feet) and has a branch 



