EXPLANATION OF PLATE IX. 



SPARTINA. (1) Portion of the inflorescence of S. stricta, of the natural 

 size; (2) a spikelet enlarged; and (3) the same displayed, the flower 

 raised above the empty glumes. 



CTENIUM. (1) Spike of C. Americanum ; (2) a single spikelet magnified; 

 and (3) the same displayed, the empty glumes separated. 



BOUTELOUA. (1) A portion of the compound spike of B. racemosa, of 

 the natural size; and (2) a spikelet displayed and magnified, the flowers 

 raised out of the empty glumes. 



GYMNOPOGON. (1) Inflorescence of G. racemosus, reduced in size; and 

 (2) a magnified spikelet with the parts displayed. 



CYNODON. ( 1 ) Inflorescence of C. Dactylon, of digitate spikes ; (2) a 

 spikelet magnified and displayed, showing a perfect flower and a rudiment. 



ELEUSINE. (1) One of the spikes from the digitate inflorescence of E. 

 Indica; (2) a magnified spikelet; (3) the same with the flowers more 

 displayed; (4) a flower from the last, showing its parts; (5) the fruit 

 magnified, showing the seed loose in the utricle; and (6) the wrinkled 

 seed detached. (1, under Dactyloctenium} Inflorescence of E. JEgyp- 

 tiaca, of digitate spikes; (2) one of the spikelets magnified; (3) the fruit 

 magnified, showing the seed loose in the thin pericarp (utricle) ; and 

 (4) the wrinkled seed more magnified. 



DIPLACHNE. (1) Small portion of the inflorescence of D. fascicularis ; 

 (2) one of its spikelets displayed and magnified; (3) an open flower of 

 the same. 



