62 Forest Club Annual 



DECIDUOUS BROAD-LEAF TREES. 



/. Leaf-scars whorled, three (rarely two) at each node, oval 



with many bundle-scars in a line forming an ellipse, no 



stipule-scars, no terminal bud, tip-scar prominent, twig large, 



buds small globular partially sunk -in bark. Catalpa Scop. 



//. Leaf-scars opposite, two at each node. 



ai. Bundle-scars three forming a lunate line. 



bi. Stipule-scars represented by a line connecting leaf-scars. 

 ci. Terminal bud one-eighth to one-fourth inch long, two 

 or more pair of scales visible, stipular line always 

 present, leaf-scars narrow lunate. 



Acer Linn. (Except A. macrophyllum.) 

 di. Terminal bud acuminate dark brown, conical with 

 five or six pair of scales visible, twigs brown gla- 

 brous, stipular line straight. 



A. saccharum Marsh. 

 d2. Terminal bud red or greenish with one or two 



pair of scales visible, buds obtuse or globular. 

 ei. Stipular line between leaf-scars straight, twigs 

 glabrous, usually red or reddish brown, scales 

 glabrous. *A. saccharinum Linn. 



*A. rubrum Linn. 



2. Stipular line usually broad and sharp angled, 

 twigs change from green through several shades 

 of purple and red during winter, often with 

 white bloom, buds changing color with twigs, 

 bud-scales often apiculate, outer pair slightly 

 pubescent, inner scales silky tomentose. 



A. negundo Linn. 



C2. Terminal bud long-lanceolate or flattened, one pair 

 of scales visible, stipular line usually present, bundle- 

 scars three often united or indistinct, leaf-scars nar- 

 row lunate, especially in those near base of twig. 



Cornus Linn. 

 b2. Stipule-scars and stipular line absent. 



Cornus (see above). 

 a2. Bundle-scars five to many, often nearly united, forming 



a U-shaped line. 



bi- Terminal buds one-half inch or longer and half as 

 broad coated with wax, many light brown scales, bundle- 



*It is difficult to distinguish between these two species without 



leaves or fruit. A. saccharinum often has apiculate bud-scales and 



rather long, narrow buds while A. rubrum rarely has apiculate scales 

 and usually quite globular buds. 





