EXOGENOUS SERIES BROADLEAF WOODS. 73 



TxCalifornia Sycamore. Platanus racemosa Nutt. 

 Nomenclature. 



Sycamore, Buttonwood, Buttonball Tree, Buttonball (Call- 

 fornia). 



Locality. 

 California. 



Features of Tree. 



Seventy-five to one hundred feet in height, occasionally higher; 

 three to four feet in diameter. The bark exfoliates in irreg- 

 ular patches. 



Color, Appearance, or Grain of Wood. 



Heartwood light reddish brown, sapwood lighter, close-grained, 

 compact structure, medullary rays numerous and conspicu- 

 ous. Beautiful when quartered. 



Structural Qualities of Wood. 



Brittle, very difficult to split and to season. Qualities similar 

 to those of P. occidentalis. 



Representative Uses of Wood. 



Decoration, furniture, similar to P. occidentalis. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



30. 

 Modulus of Elasticity. 



800, ooo. 

 Modulus of Rupture. 



7900. 



Remarks. 



Hough mentions * a tree twenty-nine feet seven inches in cir- 

 cumference. 



* "American Woods," Part 6, p. 36. 



