92 CUPULIFER^E. Quercus. 



282. Quercus heterophylla, Miclix. f. 

 Bar tram's Oak. 



Salem and Cumberland Counties, New Jersey ; North Carolina (J/. A. 

 Curtis) ; and doubtfully from North Carolina and eastern Texas. 



A small tree, 12 to 15 metres in height, with a trunk 0.45 to 0.60 metre 

 in diameter ; rare and very local, and often considered a natural hybrid. 



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

 annual growth marked by several rows of small open ducts; medullary 

 rays numerous, conspicuous ; color light brown tinged with red, the sap- 

 wood somewhat darker. 



283. Quercus cinerea, Miclix. 



Upland Willow Oak. Blue Jack. Sand Jack. 



North Carolina, south near the coast to Cape Malabar and Pease Creek, 

 Florida, west along the Gulf coast to the valley of the Brazos River, 

 Texas, extending north through eastern Texas to about latitude 33°. 



A tree 9 to 15 metres in height, with a trunk rarely exceeding 0.20 

 metre in diameter ; sandy barrens and dry upland ridges. 



Wood heavy, hard, strong, close-grained, compact ; layers of annual 

 growth marked by several rows of not large open ducts ; medullary rays 

 distant, thin, conspicuous ; color light brown tinged with red, the sap-wood 

 darker. 



284. Quercus hypoleuca, Engelm. 



Limpia Mountains, Texas, valleys of the high mountain ranges of 

 southwestern New Mexico, Santa Rita Mountains, Arizona, above G,000 

 feet elevation ; in Sonora. 



A small evergreen tree, 9 to 15 metres in height, with a trunk some- 

 times 0.75 metre in diameter ; dry, gravelly slopes and summits, the large 

 specimens hollow and defective. 



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

 annual growth marked by few small open ducts ; medullary rays broad, 

 conspicuous; color dark brown, the sap-wood much lighter. 



285. Quercus imbricaria, Michx. 

 Shingle Oak. Laurel Oak. 



Eastern Pennsylvania, west through southern Michigan, southern Wis- 

 consin, and southeastern Iowa to southeastern Nebraska and northeast- 

 ern Kansas, south to northern Georgia and Alabama, middle Tennessee, 

 and northern Arkansas. 



A tree 24 to 30 metres in height, with a trunk 0.60 to 0.90 metre in 

 diameter ; rich woodlands. 



Wood heavv. hard, rather coarse-grained, checking badly in drying ; 

 layers of annual growth marked by many rows of large open ducts ; 



