io6 Trees with Simple Leaves. [A m 



Acorns, two to three together on a short stem (about one 

 fourth inch), or single and nearly stemless. Cup, 

 round saucer-shape, rather thin, with very small 

 scales, not warty. Nut, about one half inch long ; 

 egg-shape or oval ; more than one third covered by 

 the cup ; shining blackish-brown, and often slightly 

 striped ; very sweet. 



Found, from the coast of Massachusetts southward and 



westward. 

 A tree twenty to fifty feet high, of value, especially in 



the Southwestern States, where it is very common. 



Fig- 55- Burr Oak, Mossy-cup Oak, Over-cup White Oak. 



Q. macrocarpa, Michx. 



Leaves, SIMPLE ; ALTERNATE ; LOBED (the edge of the lobes 

 entire, or of the larger ones sometimes wavy). 



Outline, reverse egg-shape. Base, wedge-shape. Apex 

 of the lobes, rounded. 



Leaf, six to fifteen inches long (the longest of the oak- 

 leaves) ; smooth above, downy beneath ; the lobes 

 usually long and rather irregular, the middle ones 

 longest and often extending nearly to the middle rib. 



Bark of the young branches always marked with corky 

 wings or ridges. 



Acorns, large, with short stems. Cup, two thirds to two 

 inches across, roughly covered with pointed scales, 

 and heavily fringed around the nut. Nut, very large 

 (one to one and a half inches long) ; broad egg- 

 shape ; one half to two thirds or often wholly en- 

 closed by the cup. 



Found, along the coast of Maine southward as far as the 

 Penobscot, in Western New England, in Western 

 New York, in Pennsylvania, and thence westward to 

 the foot-hills of the Rocky Mountains of Montana, 



