A FIELD GUIDE IN NATURE-STUDY 



Red Oak (Q. rubra) 



i Leaves deeply pinnately 

 lobed 



j Longest lobes about 

 equaling widest middle 

 portion 



jj Longest lobes two to 

 six times widest middle 

 portion 



k Scales of cup not 

 sticking out 

 / Acorn globose, 



cup shallow 

 // Acorn ovoid, cup 

 covers about half 

 m Interior bark 



red 



mm Interior bark 

 yellow 



Northern Pin Oak (Q. ellipsoidalis) 

 kk Scales of cup stick- 

 ing out 



ii Leaves, entire lanceolate 

 ^/Leaves not lobed 



g Leaves spreading out on opposite 

 sides of twig appearing two- 

 ranked 

 h Sap milky 

 hh Sap not milky 



i B ark smooth; trunk fluted 

 ii Bark rough 



j Leaves oblique at base; 

 bark coarsely furrowed 

 k Leaves large, nearly 



as broad as long 

 kk Leaves not nearly as 

 broad as long 

 / L eaves very 

 rough; branchlets 

 and buds downy 

 // Leaves smooth; 

 branchlets and 

 buds smooth 



jj Leaf base not oblique 



k Bark smooth, gray 



kk Bark finely furrowed 



Pin Oak (Q. palustris) 



Scarlet Oak (Q. coccinea) 



Black Oak (Q. velutina) 

 Laurel Oak (Q. imbricaria) 



Mulberry 

 Hop Hornbeam 



Basswood 



Red Elm 



White Elm 



Beech 

 Ironwood 



