20 THE PRINCIPAL SPECIES OF WOOD. 



Cow Oak. Quercus michauxii Nult. 



Nomenclature. (Sudworth.) 



Cow Oak (local and common Swamp White Oak (Del., 



name). Ala.). 



Basket Oak (Ala., Miss., La., Swamp Chestnut Oak (Fla.). 

 ' Tex., Ark.). 



Locality. 



Southeastern United States, Delaware and Florida, westward 

 along Gulf to Texas. Also southern Indiana and Illinois to 

 Gulf. Best on rich bottoms in Arkansas and Louisiana. 



Features of Tree. 



Seventy-five to one hundred feet in height. Three to six feet in 

 diameter, rough, light-gray bark with loose scaly ridges. 



Color, Appearance, or Grain of Wood. 



Heartwood light brown, light buff sapwood,, conspicuous 

 medullary rays, close-grained. 



Structural Qualities of Wood. 



Hard, heavy, very strong, tough, durable, easily split. 



Representative Uses of Wood. 



Construction, agricultural implements, wheel stock. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



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



50. 

 Modulus of Elasticity. 



1,610,000 (average of 256 tests by U. S. Forestry Div.).* 



1,370,000. 



Modulus of Rupture. 



11,500 (average of 256 tests by U. S. Forestry Div.).* 



1 5, 800. 



Remarks. 



The principal white oak of Southern States; edible acorns 

 devoured by cattle, whence its name. 



See page 8. 



