KEY TO GENERA AND SPECIES 85 



130. Acorn cup covering about half the nut 

 131- 



130. Acorn cup shallow and broad, covering con- 



siderably less than half the nut 132. 



131. Inner (or upper) thin scales 



of the cup finely hairy, 

 and the tips loosely over- 

 lapping. Buds usually 

 pointed and woolly-hairy 

 all over, somewhat an- 

 gular in cross section. 

 Inner bark yellowish- 

 orange and very bitter. 

 Southern Me. southward 

 and westward. (Figs. 154, 

 157.) Black Oak, Yellow- Fig " is8 ' 

 bark Oak, Yellow Oak, Quercus velutina 

 Lam. 



131. Inner (or upper) thin scales of the cup smooth 

 or essentially so, and the tips very snugly 

 overlapping. Buds usually blunt, hairy 

 only near the tip, not usually angular in 

 cross section. Inner bark reddish, not 

 bitter. Southern Me. southward and west- 

 ward. (Fig. 155.) Scarlet Oak, Quercus 

 coccinea Muench.* 



* See note on page 86. 



