84 THE PRINCIPAL SPECIES OF IVOOD. 



^ . . J f Populus del t aides Marsh. 



Cottonwood. \ V \. J 7 V- a; 



(^ Foputus vionilifera Ait. 



Nomenclature. (Sudworth.) 



Cottonwood (local and com- Big Cottonwood (Miss., Neb.). 



men name). Whitewood (la.). 



Carolina Poplar (Pa., Miss., Cotton Tree (N. Y.). 



La., N. M., Ind., Ohio). Necklace Poplar (Tex., Col.). 



Yellow Cottonwood (Ark., Broadleaved Cottonwood 



la., Neb.). (Colo.). 



Locality. 



Canada to Florida, westward intermittently to Rocky Moun- 

 tains. 



Features of Tree. 



Seventy-five to one fiundred feet in height, four to five feet in 

 diameter, occasionall"y much larger. Long catkins distribute 

 cotton-like fibres. 



Color, Appearance, or Grain of Wood. 



Thin heartwood, dark brown, sapwood nearly white, close- 

 grained, compact structure. 



Structural Qualities of Wood. 



Light, soft, weak, liable to warp, difficult to .season. 



Representative Uses of Wood. 



Greatly valued in manufacture of paper-pulp, also packing- 

 boxes, fence-boards, fuel. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



24. 

 Modulus of Elasticity. 



1,400,000. 

 Modulus of Rupture. 



10,900. 



Remarks. 



Monilifera is from the Latin monolinum, a necklace, and /ero, 

 to bear, and refers to the long necklace or catkin. 



