TREES OF NORTH CAROLINA 13 



b. Edges of leaves with teeth or lobes. 



x Blade of leaf as long as broad or less 

 than twice longer than broad. 

 Blade of leaf broad and notched at the 



end Tulip Tree, "Poplar" (77) 



Blade of leaf pointed at the end. 

 Fruits on a leaf-like bract. 



Leaf green beneath American Linden (135) 



Leaf gray and moderately tomen- 

 tose beneath with short hairs ; 

 bracts mostly abruptly narrowed 

 at the base and under 4 inches 



long White Linden (136) 



Leaf silvery and densely covered 

 beneath with short hairs ; bracts 

 usually tapering at the base and 



mostly over 4 inches long Michaux's Linden (137) 



Leaf rusty beneath with short 



hairs Downy Linden (138) 



Fruits not on a leaf-like bract. 



Leaves flve-lobed, smooth and 



shining Sweet Gum (83) 



Leaves large with many irregular 

 lobes and teeth ; bark white, 



flaky .Sycamore (84) 



Not as above. 



Blade six inches or more long, 



not lobed Cotton-wood (23) 



Blade smaller or deeply lobed. 

 Leaf-stalks not flattened. 

 Leaves smooth on both 



sides ; fruit white White Mulberry (p. 52) 



Leaves more or less tomen- 



tose below, harsh above ; 



not increasing by suckers Red Mulberry (70) 



Leaves densely soft, tomen- 



tose below, harsh above ; 



increasing by suckers. . . .Paper Mulberry (p. 52) 

 Leaf-stalks flattened below the 

 blade. 



Leaves white tomentose be- 

 neath White Poplar (p. 30) 



Leaves smooth, teeth large, 



less than 14 on each side Large-toothed Poplar (24) 

 Leaves smooth, teeth small, 

 more than 14 on each 

 side Carolina Poplar (22) 



