1 6 THE PRINCIPAL SPECIES OF WOOD. 



Oat \ Quercus minor Sargent, 



\ Quercus obtusiloba Michx. 



Nomenclature. (Sudworth.) 



Post Oak (local and common Overcup Oak (Fla.). 



name). White Oak (Ky., Ind.). 



Iron Oak (Del., Miss., Neb.). Box Oak (Md.). 



Box White Oak (R. I.). Brash Oak (Md.). 

 Chene etoile (Quebec). 



Locality. 



East of Rocky Mountains Massachusetts to northern Florida, 

 westward intermittently to Nebraska and Gulf States. 



Features of Tree. 



Fifty to seventy feet in height, two to three feet in diameter. 

 Low shrub in Florida. Blunt lobes or projections to leaves. 

 Leaves clustered at ends of branches. Fine tree with rounded 

 top. 



Color, Appearance, or Grain of Wood. 



Heartwood light or dark brown with lighter sap wood. Close- 

 grained, annual rings well marked. Numerous and con- 

 spicuous medullary rays. 



Structural Qualities of Wood. 



Heavy, hard, strong, checks badly in drying. Durable in con- 

 tact with soil. 



Representative Uses of Wood. 



Largely used, particularly in Southwest, for fencing, railway ties, 

 and fuel; also for cooperage, construction, etc. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

 50 (U. S. Forestry Div.).* 



52. 



Modulus of Elasticity. 



2,030,000 (average of 49 tests by U. S. Forestry Div.).* 

 i, 180,000. 



Modulus of Rupture. 



12,300 (average of 49 tests by U. S. Forestry Div.).* 



12,900. 



Remarks. 



Most common and widely distributed oak in Gulf States west of 

 the Mississippi River. Obtusiloba, the Latin for blunt-lobed, 

 refers to the shapes of the leaves. Wood seldom commercially 

 distinguished from white oak. 



* See page 6. 



