TULIP-TREE 



sown in autumn they come up the succeeding spring, but if 

 sown in spring they often remain a year in the ground^ It 

 is readily propagated by cuttings and easily transplanted. 



The Liriodendron is now a genus of a single species. In 

 the cretaceous age the genus was represented by several spe- 

 cies, and was widely distributed over North America and 

 Europe. Its remains are also found in the tertiary rocks. 

 One species alone survived the glacial ice, and this is found 

 only in eastern North America and western China the well- 

 known Tulip-tree of the western states. 



