GleditscMa. LEGUMINOSJE. 29 



A small tree, 5 to 7 metres in height, with a trunk sometimes 0.15 to 

 0.2 ."> metre in diameter ; borders of streams and prairies. 



Wood heavy, very hard, strong, coarse-grained, compact ; layers of 

 annual growth clearly marked with several rows of large open ducts ; 

 medullary rays thin, conspicuous ; color light red, the sap-wood bright 

 clear yellow. 



85. Gymnocladus Canadensis, Lam. 

 Kentucky Coffee-tree. Coffee-nut. 



Southern Pennsylvania (rare) ; western New York (rare) ; west through 

 southern Ontario and southern Michigan to the valley of the Minnesota 

 River, Minnesota, eastern Nebraska, eastern Kansas, southwestern Arkan- 

 sas, and the Indian Territory, extending south to middle Tennessee. 



A tree 25 to 33 metres in height, with a trunk 0.00 to 0.90 metre in 

 diameter ; rich woods and bottom-lands ; not common. 



Wood heavy, not hard, strong, coarse-grained, durable in contact with 

 the ground, liable to check in drying, easily worked, susceptible of a high 

 polish ; layers of annual growth clearly marked by one or two rows of 

 open ducts ; medullary rays numerous, thin ; color light rich brown tinged 

 with red, the thin sap-wood lighter ; occasionally used in cabinet-making, 

 for posts, rails, etc. 



The fresh leaves, macerated and sweetened, are occasionally used as a 

 poison for house-flies ; the seeds, formerly as a domestic substitute for coffee. 



86. Gleditschia triacanthos, L. 



Honey Locust. Black Locust. Three-thorned Acacia. Sweet Locust. 

 Honey Shucks. 



Western slopes of the Alleghany Mountains of Pennsylvania, west 

 through southern Michigan to eastern Nebraska, eastern Kansas, and the 

 Indian Territory ; south to Tampa Bay, Florida (not detected in east 

 Florida), northern Alabama, northern Mississippi, and the valle}' of the 

 Brazos River, Texas. 



A tree 25 or 30 metres, or exceptionally 40 metres, in height, with a 

 trunk 0.60 to 1.20 metres in diameter; low, rich bottom-lands, or more 

 rarely on dry, sterile hills ; the characteristic tree of the " barrens " of 

 middle Kentucky and Tennessee ; reaching its greatest development on the 

 bottom-lands of the lower Ohio River basin ; widely cultivated for shade 

 and as a hedge plant, and now somewhat naturalized in the Atlantic States 

 east of the Alleghany Mountains. A not uncommon form, nearly destitute 

 of thorns, is var. inermis, Pursh. 



Wood heavy, hard, strong, coarse-grained, moderately compact, very 

 durable in contact with the soil, susceptible of a high polish ; layers of 

 annual growth strongly marked by many rows of open ducts ; medullary 

 rays numerous, conspicuous ; color bright brown or red, the sap-wood 

 lighter ; used for fence posts and rails, wagon hubs, construction, etc. 



