WESTERN WHITE OAK 



more than. \ inch high and proportionately narrow. In Radial 

 section they are silvery like white satin, very brilliant and beau- 

 tiful. The pores are filled with reddish contents (thyloses) 

 which are much deeper in colour than the rest of the wood. In 

 transverse section the rays scarcely increase at all in width as 

 they proceed outwards towards the bark. 



I have no solid specimen that I can call authentic, the above 

 details being taken from Hough's section No. 15. 



No. 198. AMERICAN WHITE OAK. Quercus alba. 



Linn. 



Plate XIV. Fig. 125. 



Natural Order. Cupulifers. 



Alternative Names. Baltimore Oak (60). The popular name 

 of " White Oak " is widely applied to many other species. 



Sources of Supply. North America, Canada and the United 

 States. 



Physical Characters, etc. Recorded dry-weight 43^-65! lbs. 

 per cu. ft. Boulger (15) gives the figures " 1,054 to 695 " as the 

 specific gravity and " 46 - 35 " for the weight per cu. ft., thus im- 

 plying that the former may vary while the latter is constant. 



Bark. " Whitish-grey " (49). 



Uses, etc. "Perfectly straight timber may be had from 25-40 ft. 

 long by 11-20 in. square . . . the wood is less hard and horny than 

 the White Oak (see note), and when thoroughly dry is scarcely so 

 strong as Fir or Pine. Inferior to Q. robur " (60). Laslett deals 

 with Q. alba under two quite different heads, viz. " White Oak " 

 and " Baltimore Oak," and ascribes different properties to each 

 notwithstanding that he includes them in the same species. 



Authorities. Laslett (60), pp. 167, 172. Kew Guide (57), p. 45. 

 Hough (49), part ii. p. 28. Boulger (15), p. 262. 



Colour. Heart-wood, brownish or reddish-brown, sharply de- 

 fined from the nearly white sap-wood. 



Anatomical Characters. As those of Quercus Robur, No. 196, 

 from which it is difficult to distinguish. As I possess no properly 

 authenticated specimen, I have used Hough's section to arrive at 

 the above facts. The rays in radial section are dull except when 

 viewed in one direction. 



No. 199. WESTERN WHITE OAK. Quercus Gar- 

 ryana. Dougl. 

 Plate XIV. Fig. 125. 

 Natural Order. Cupuliferse. 

 Synonym. Q. Jacobi, R. Br. 



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