308 



WEEDS AND USEFUL PLANTS. 



193 



1. CL macrocar'pa, MX. Leaves deeply and 

 somewhat lyrately sinuate-lobed, the lobes ob- 

 tuse, sparingly and obtusely toothed ; acorn 

 very large ; cup hemispherical, fringed above 

 with hard and thick-pointed scales, the upper- 

 most of which are awned .; nut ovoid, more than 

 half immersed in the cup. 

 LARGE-FRUITED QUERCUS. Bur-oak. Over- 

 cup Oak. Mossy-cup White Oak. 



Trunk 40-60 foet high. Leaves obovato in outline, 6-12 

 inches or more in length ; the smaller ones entire. Acorns 

 1- \y z inch long, sometimes entirely enclosed in the con- 

 spicuously fringed cup. 



West New England, west and southwest. 



06s. A handsome middle-sized tree with luxu- 

 riant foliage and remarkably large acorns. 

 The wood is valuable for those uses which re- 

 quire stiff and durable wood. As a fuel it 

 takes rank with the White Oak. A variety with 



narrower and more deeply lobed leaves and oblong fruit is the QUCFCUS 

 olivaefor'mis of Michaux. 



183 



2. ft. obtusi'loba, MX. Leaves tawny pu- 

 bescent beneath, obovate-oblong, cuneate at 

 base, irregularly sinuate-lobed, the upper 

 lobes larger and often 1 - 3-notched ; acorn 

 roundish ovoid r rather small. 

 OBTUSE-LOBED QUERCUS. Barrens White Oak. 

 Post Oak. Rough Oak. 



Stem 20-40 or 50 feet high ; branches irregular, 

 spreading, densely pubescent when young. Leai*es 4-6 

 inches long, thick and coriaceous, mostly with 3 un- 

 equal lobes on each side and unequal angular sinuses 

 the upper surface smoothish and shining (often roughish 

 with short fasciculate hairs, when young), the under 

 surface pale ferruginous, or tawny, and clothed with a 

 stellate pubescence ; petioles about half an inch long. 

 Acorn rather small, oval or roundish-ovoid, with the 

 apex often depressed or umbilicate the lower half cm- 

 braced by the scaly hemispherical cup, which is sessile, 

 or the fruit often in small clusters on a common pe- 

 duncle. 



Dry sterile hills. Massachusetts, west and south. 



Obs. This tree seems to be confined to barren hills, and exposed ridges. 



FIG. 198. The Bur or Over-cup Oak (Quercus macrocarpa). The figures of all the oaks 

 represented here are less than half the natural size. 



FIG. 199. The Post or Rough Oak (Quercus obtusiloba.) 



