10 KEY TO THE SPECIES 



Wing broad, extending more than 

 half way down tne short plump 



seed Small's Ash (158) 



Wing long, narrow, pointed or notch- 

 ed, not extending down the short 

 plump seed. 



Twigs and leaf -stalks smooth White Ash (153) 



Twigs and leaf-stalks tomentose . . Biltmore Ash (154) 

 Wing broad, extending all around the 



seed ; a tree of the coastal swamps Water Ash (159) 

 Leaflets, at least some of them, lobed ; 



fruit double, with two wings Ash-leaved Maple (132) 



C. Leaves simple, alternate on the twig. 



Fruit not an acorn. (For "Fruit an Acorn" 



see page 16.) 

 1. Branches thorny. 



Edges of leaves not toothed or lobed Osage Orange (p. 52) 



Edges of leaves with teeth or lobes. 

 Fruit % inch or more thick. 



Leaves at least twice as long as 



broad Narrow-leaved Crab (88) 



Leaves nearly as broad as long Crab Apple (89) 



Fruit not % inch thick. 

 Leaves three-lobed. 



Leaves about twice as long as 



broad, acute at base Qreen Haw (94) 



Leaves about as broad as long, not 



acute at base Washington Thorn (102) 



Leaves deeply cut with more than 



three lobes Parsley Haw (100) 



Leaves not deeply lobed. 



Nutlets with cavities on their in- 

 ner faces. 



Fruits globose Chapman's Thorn (103) 



Fruits pear-shape Pear Thorn (104) 



Nutlets witnout cavities on their 

 inner faces 



Leaves about twice as long as 

 broad. 



Leaves small, mostly less than 

 one inch wide. 



Leaves dark shiny green 

 above, smooth, toothed on 

 upper half; fruit nearly 

 % inch in diameter Cock-spur Thorn (90) 



