82 



FAMILIES OF FLOWERING PLANTS. 



more for its beauty as a shade tree than for its value as lumber; the 

 mucilaginous inner bark of the slippery elm [IJlmiis fidva) is a well- 

 known officinal product. All the Ulmaceae are trees or shrubs, with 



Fig. 07.— a tropical species of Fig {Ficny urbutifolia) shading a house in Porto Rico. 

 After photograph by iVIr. G. N. Collins. 



small clustered monoecious or dioecious flowers having a perianth of 

 several distinct or united sepals. The fruit is variable, being in Ulmus 



