370 
Fig. 
o per 
DESCRIPTION OF PLATES. 
Prate IX. QUERCUS CRASSIPOCULA, (page 365.) 
(A BRANCH, OF THE NATURAL SIZE.) 
1. A leaf from a young shoot. 
Pirate X. BOUTELOUA (CHONDROSIUM) POTYSTACHYA, (page 366.) 
(AN ENTIRE PLANT, OF THE NATURAL SIZE.) 
A spikelet ; magnified. | 
The superior glume. 
Inferior palea of the perfect flower ; magnified. 
Superior palea of the same ; equally magnified. 
Sterile flower ; also magnified. 
The achenium, crowned with the persistent styles. 
