SUMMARY. 



The Oaks are distinguished by their fruit, which is an acorn. 



The White Oak Group, distinguished by its hght gray, scaly bark, 

 and the rounded lobes or teeth of the leaves : 



The ivhite oak. The leaves obovate, five or six inches long, 

 their lobes usually seven and at equal distances apart, and 

 their sinuses deep or shallow, acorn small, with a ratlier 

 shallow and not fringed cup. 



The bur oak. The leaves obovate, downy or pale on their 

 lower surface, toothed toward the tips and irregularly and often 

 deeply lobed toward the base, the acorn cups heavily fringed 

 on their margins, the young branches corky. 



The chestnut oak. The leaves longer than obovate, toothed 

 with rounded teeth and yellow-ribbed, the acorn long and its 

 cup hard- scaled, the bark dark with broad deep furrows. 



llie swamp white oak. The leaves obovate, white downy 

 on their lower surface, toothed with squarish teeth, the bases 

 wedge-shaped, the acorn small with the margin of its cup 

 finely fringed. 



The Black Oak Group, distinguished by its dark furrowed bark 

 and the pointed lobes of the leaves : 



The red oak. The leaves obovate or sometimes shorter, 

 their seven to nine lobes triangular and pointing toward the 

 tips, the large acorn flat-cupped. 



The scarlet oak. The leaves obovate, bright scarlet in 

 autumn, thin, smooth on their lower surface, their sinuses 

 deep, wide and rounded, the margin of the acorn cups 

 rounding inwards and their scales close, the inner bark 

 reddish. 



The black oak. The leaves obovate, coarser, downy on their 

 lower surface until midsummer or later, wider towards the tip, 

 their sinuses shallow (or sometimes as in the scarlet oak), the 

 margin of the acorn cups not rounding inwards and their scales 

 looser, the inner bark orange, 



