146 KEY TO GENERA AND SPECIES 



208. Flowers usually less than 2 inches broad, 

 thickly spotted with yellow and purple. 



Fig. 276. Hardy Catalpa. 



Fig. 277. Common Catalj 



Fig. 278. Sweet Vi- 

 burnum, a. Leaf. 

 b. Magnified mar- 

 gin. 



Bark thin and usually not rough on medium 

 sized trunks. Lower Mississippi valley and 



