Bumelia. SAPOTACE^. 57 



Wood very heavy, exceedingly hard, strong, close-grained, checking in 

 drying, containing few scattered small open ducts ; medullary rays nu- 

 merous, not conspicuous ; color bright orange, the sap-wood yellow ; 

 largely used in ship and boat building. 



177. Dipholis salicifolia, A. DC. 

 Bustic. Cassada. 



Semi-tropical Florida, — Bay Biscayne to the southern keys ; through 

 the West Indies to Brazil. 



A tree sometimes 15 metres in height, with a trunk rarely 0.60 metre 

 in diameter ; the large specimens hollow and defective ; rare. 



Wood very heavy, exceedingly hard, very strong, close-grained, com- 

 pact, checking in drying, susceptible of a beautiful polish, containing 

 many scattered large open ducts ; color dark brown or red, the sap-wood 

 lighter. 



178. Bumelia tenax, Willd. 



North Carolina, southward near the coast to Cape Canaveral and 

 Cedar Keys, Florida. 



A small tree, 6 to 9 metres in height, with a trunk sometimes 0.15 

 metre in diameter ; sandy soil. 



Wood heavy, hard, not strong, very close-grained, compact, susceptible 

 of a beautiful polish ; well characterized, as in all the North American 

 species, by large open ducts, defining, with several rows, the rings of 

 annual growth, connected by conspicuous branching groups of similar 

 ducts ; medullary rays numerous, thin ; color light brown streaked with 

 white, the sap-wood lighter. 



179. Bumelia lanuginosa, Pers. 

 Gum Elastic. S /litlim-wood. 



Georgia and northern Florida to Mobile Bay, Alabama ; southern Illi- 

 nois and southern Missouri, through Arkansas to the valley of the Rio 

 Grande, Texas. 



An evergreen tree, sometimes 18 metres in height, with a trunk 0.90 

 metre in diameter, or in the Atlantic States much smaller, rarely exceed- 

 ing 6 metres in height ; common and reaching its greatest development 

 on the rich bottom-lands of eastern Texas. 



Wood heavy, soft, weak, close-grained, very compact, the open ducts 

 conspicuous ; medullary rays numerous, thin ; color light brown or yellow, 

 the sap-wood lighter ; somewhat used in cabinet-making. 



180. Bumelia spinosa, A. DC. 



Arizona, — Santa Catalina Mountains ; Parras and Saltillo, Mexico. 

 A small tree, 6 to 7 metres in height, with a trunk 0.20 to 0.25 metre 

 in diameter ; dry, gravelly soil, near water-courses ; rare. 



