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 (U/mus fulva) is a well- 
known officinal product. All the Ulmaceae are trees or shrubs, with 
Fia. 67.—A tropical species of Fig (icus arbutifolia) shading a house in Porto Rico. 
After photograph by Mr. 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 
