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36. Quercus pahistris, of Du Roy. — Pin Oah 



This is our most beautiful and graceful oak tree. The leaves 

 are obloug, smooth, shining, bright green on both sides, stand- 

 ing on long petioles, so that they are wafted about by every wind 



that blows. The sinuses of the 

 leaves are very broad, deep and 

 rounded, the lobes divergent, acute, 

 cut-lobed and often toothed. The 

 acorns are small, nearly globular, 

 about half covered by the cups. The 

 bark is black, and much cracked into 

 little irregular squares. The Pin 

 Oak (often improperly called Black 

 Oak) is quite common, especially in 

 the borders of prairie openings. 



The following species of oak are 

 found in neighboring States, and 

 some of them may, therefore, be 

 [looked for in Wisconsin : 



Quercus olivceformis.^ Michx — Mossy 

 over cup Oak. 



Q. castanea, WiJld. — Chestnut Oak. 

 Q. 'pnnoides^ Willd. — Dwarf Oak. 

 Q. imbricaria^ Michx. — Laurel Oak. 

 Q. nigra, Linn. — Black Jack Oak. 

 Q. iindoria, Bart. — Black Oak. 

 Q. leana, Nuttall. — Lea's Oak. 



The oaks are not only among the most useful, but they are 

 also among the most ornamental of the native forest trees. In 

 their young state they have the properties of lightness and ele- 

 gance; at greater matarity they possess majesty and even gran- 

 deur. In the close woods they do not naturally show their full 

 and proper development, on account of their crowded condition. 

 But in the oak openings we see them with spreading arms, shad- 

 ing a large extent of ground and presneting beautifully rounded 

 forms to the eye. The foliage of the pin-oak is peculiarly light, 



SWAMP WHITE-OAK. 



