KEY, BASED UPON LEAVES. 



A KEY, BASED UPON THE LEAVES, 



Designed as An Aid in Identifying the Species represented in Parts I, H, in, IV 

 and V when out of season for procuring the Flowers. 



N. B. As this key applies only to the species thus far represented in AMERICAN 

 WOODS it is important always to confirm identification by applying the more detailed 

 description given in its proper place. 



a. Deciduous Leaves falling in autumn. 

 b. Simple Leaves. 



C. Laminate with well-marked blade and petiole. 

 d. Main rib single pinnately veined. 

 . Entire or nearly so, pointed at both ends and 

 /. Opposite 



3-5 in. long, thick, lustrous above . . 9. NYSSA MULTIFOBA. 



5-6 in. long, thin, dull above 89. CATALPA BIGNONIOIDES. 



/ 3 . Alternate, and 

 g. Large, thinnish 



Oblong, 5-10 in. long, petioles 1-2 in. ... 1. MAGNOLIA ACUMINATA. 

 Obovate-lanceolate, 6-12 in. long, petiole scarcely in. 



76. ASIMINA TRILOBA. 



gr 2 . Smaller, 3-6 in. long, thick, whitish and pubescent at least on the 



veins beneath. 

 h*. Not glaucous but 



Petioles about 1 in. long 61. DIOSPYROS VIRGINIANA. 



Petioles about 4 in. long 110. NYSSA OGECHE. 



e* Serrate, serulate or dentate. 



f t Inequilateral and cordate or truncate at base. 

 g. Ovate-orbicular, large, 4-5 in. or more in length. 



3. TILIA AMERICANA. 

 g*. Ovate, long-taper-pointed from a broad base. 



12. CELTIS OCCIDENTALIS. 

 gr 3 . Ovate-oblong and 



h. Very rough, especially above, rugose 11. ULMUS FULVA. 



W. Smoothish and 



i. 2-4 in. long, fruit in 



Fascicles 33. ULMUS AMERICANA. 



Racemes.. ..34. ULMUS RACEMOSA. 



