THE OAKS WITH ACORNS. 



165 



ticed that many of the smooth nuts are striped, but a 

 much more reliable 

 characteristic is 

 connected with 

 the kernel ; this 

 is very yellow 

 and bitter. The 

 inner bark of 

 this oak is 

 orange in col- 

 or and sat- 

 urated with 

 tannin, which 

 makes it valua- 

 ble to the tanner 

 and dyer. It is 

 commercially known 

 as quercitron. 



Pin or Swamp Tne leaf of 



Spanish Oak. the pin oak 



Quercas palustris. hag ^^ 



rounded, deep incisions and 

 sharp, bristle - tipped divis- 

 ions ; it is bright green above 



and a trifle paler below in summer, and in autumn 

 it changes to a rich bronze red. The acorn has a 

 saucer-shaped cup with thin scales, and a round- 



Pin Oak. 



