KEY, BASED UPON LEAVES. 



A KEY, BASED UPON THE LEAVES, 



Designed as an Aid in identifying the Species represented in Parts I to VI 

 inclusive, 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. 

 e. Entire or nearly so, pointed at both ends and 

 f. Opposite 



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



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



/ 2 . 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, 2-7 in., thickish and with 



h. Whitish pubescence at least on the veins beneath. 



Petioles about t inch long 61. DIOSPYKOS VIRGINIAN A. 



Petioles about | inch long 110. NYSSA OGECHE. 



h?. Brownish pubescence on veins beneath, margins wavy 



126. RHAMUNS PUKSHIANA. 

 / 3 . Alternate opposite and scattered upon the same plant, linear. 



134. CHILOPSIS SALIGNA. 

 e 8 . Serrate, serulate or dentate. 



/. Inequilateral and cordate or truncate at base. 

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



3. TILIA AMERICANA. 

 gp 2 . Ovate, long-taper-pointed from a broad base. 



12. CELTIS OCCIDENTALS. 

 g z . Ovate-oblong and 



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



7i 2 . Smoothish and 

 i. 2-4 in. long, fruit in 



Fascicles 33. ULMUS AMERICANA 



Racemes.. 34. ULMUS RACEMOSA. 



