Carya. 



JUGLANDACK.E. 77 



dark brown, the thin sap-wood much lighter ; more generally used in 

 <m hi net-making, interior finish, and for gun-stocks, than that of any other 

 North American tree. 



240. Juglans rupestris, Engelm. 

 Walnut. 



Valley of the upper Colorado River, west through western Texas, 

 southern New Mexico and Arizona, between 5,000 and 7,000 feet eleva- 

 tion, and in the, California Coast Ranges from the San Bernardino Moun- 

 tains to San Francisco Bay and the valley of the Sacramento River. 



A tree rarely 15 to 22 metres in height, with a trunk 0.30 to 0.90 

 metre in diameter, reaching its greatest development near its northern 

 limits in California; in Texas generally reduced to a low, much-branched 

 shrub; borders of streams and mountain canons, in rich soil. 



Wood heavy, hard, not strong, coarse-grained, checking in drying, sus- 

 ceptible of a good polish, containing numerous regularly distributed large 

 open ducts ; medullary rays distant, thin, obscure ; color rich dark brown, 

 the sap-wood lighter. 



The small nuts sweet and edible. 



241. Carya olivaeformis, Nutt. 

 Pecan. Illinois Nut. 



Southeastern Iowa, southern Illinois and Indiana, northwestern Ken- 

 tucky, south and southwest through Missouri and Arkansas to eastern 

 Kansas, the Indian Territory, western Louisiana, and Texas to the valley 

 of the Concho River. 



A tree 30 to 52 metres in height, with a trunk 0.90 to 1.80 metres in 

 diameter; borders of streams, in low, rich soil; very common and rebell- 

 ing its greatest development on the bottom-lands of Arkansas and the 

 Indian Territory ; the largest species of the genus, and the largest and 

 most important tree of western Texas. 



"VYood heavy, hard, not strong, brittle, close-grained, compact; layers 

 of annual growth marked by one or two rows of large open duets ; 

 medullary rays numerous, thin ; color light brown tinged with red ; the 

 sap-wood lighter brown ; less valuable than the wood of the other spi cii ■ 

 and hardly used except for fuel. 



The sweet edible nuts are collected in great quantities, affording an 

 important article of commerce. 



242. Carya alba, Nutt. 



Shell-bark Hickory. Shag-hark Hickory. 

 Valley of the Saint Lawrence River, northern shores of Lakes On- 

 tario and Erie to southern Michigan and southeastern Minnesota, south 

 to western Florida, central Alabama and Mississippi, and west to eastern 

 Kansas, the Indian Territory, and eastern Texas. 



