144 KEY TO GENERA AND SPECIES 



westward and southward. (Fig. 270.) 

 Blue Ash, Fraxinus quadrangulata Michx. 

 206. Branchlets not 4-sided. Wing of fruit not 

 extending around the seed-bearing portion 

 207. 



207. 



Lower surface of the leaflets paler than the 

 upper and occasionally hairy. Throughout 

 our range. (Figs. 271, 273.) White Ash, 

 Fraxinus americana L. 



Fig. 274. Green Ash. 



207. Lower surface of the leaflets bright green and 

 smooth. Central New England south- 

 ward and westward. (Figs. 272, 274.) 

 Green Ash, Fraxinus pennsykanica var. 

 lanceolata (Borkh.) Sarg. 



CATALPA. Leaves broad, egg-shaped or heart- 



