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PLATE XX. LETTER XXII. 
DIDYNAMIA G YMNOSP ERMIA. 
Fig. 1. Glechoma hederacea. Ground Ivy . 
a The kidney-shaped leaves. 
h The ringent flowers. 
c A flower opened, to show the situation of 
the stamens. 
d A flower exhibiting the cruciform appear¬ 
ance of the anthers. 
e The calyxes. 
f A single filament. 
g The pistil. 
DIDYNAMIA ANG10SPERMIA. 
Fig. 2, Bignonia radicans. Trumpet Flower. 
a The calyx. 
b The corolla. 
c The corolla displayed, to show the situa¬ 
tion of the stamens. 
d The pistil. 
Ohs . The classical character is clearly shown 
at Fig. 2. c. 
This class was farther illustrated in Plate IV. 
