102 OUR FORESTS 



"Bark not as in '. 



:Leaves usually 4 inches or more long. 

 'Large sharp teeth on edges. 



29. Chestnut. 

 ! ILarge rounded teeth on edges. 



30. Chestnut or Rock Oak. 

 : :Leaves less than 4 inches long. 



ILeaves smooth, in more than 2 rows on the 



stem, bark peehng in thin sheets. 

 X. Twigs brown, bark with wintergreen flavor, 

 bark dark brown or black. 



31. Black Birch, 

 y. Twigs gray or yellowish, trunk silvery or 

 grayish. 



32. Yellow Birch, 

 z. Twigs brownish, bark chalky white. 



33. While Birch. 



I ILeaves rough, in 2 rows on the twigs. 



X. Leaves very rough above, buds and twigs 



hairy, grayish, mucilaginous when 



chewed. 34. Slippery Elm. 



y. Leaves sUghtly rough above, buds and 



twigs smooth or nearly so, brown or 



reddish, not mucilaginous. 



35. American Elm. 

 ttfLeaves as broad as long, or broader. 

 ■Leaves sharp-pointed. 

 'Petioles (leafstalks) flattened at right angles to 

 the blade. 

 :Tree tall, slender, branches aU ascending. 



36. Lomhardy Poplar. 

 : :Tree broader, leaves green. 



37. Carolina Poplar. 

 : : :Tree broader, leaves white below. 



38. White Poplar. 

 "Petioles rounded. 



39. Basswood. 

 ■ "Leaves rounded at tip often with a lobe on one or 

 both sides. 40. Sassafras. 



" • "Leaves square, or notched at tip and sides. 



41. Tulip Tree or Tulip Poplar. 

 **Leaves deeply cut or lobed. 



fLobes rounded. 42. White Oak. 



tfLobes sharp-pointed. 



