EXPLAXATIOX OF PLATE IX. 



SPARTIXA. — (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 tlie empty glumes. 



GYMX(JPOGON. — (1) Inflorescence of G. racemosus, reduced in size; and 

 (2) a magnified spikelet with tlie parts displayed. 



CYXODUN. — (I) Inflorescence of C. Dactylon, of digitate spikes; (2) a 

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



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

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

 di.«<played ; (4) a flower from the last, showing its parts; (.5) the fruit 

 magnified, sliowing the seed loose in tlie utricle; and (G) the wrinkled 

 seed detached. — (1, under Dactijloctenium) Inflorescence of E. Mg\\y^ 

 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 wa-inkled seed more magnified. 



DIPLACllXE. — (1) Small portion of the inflorescence of D. fa.scicularis ; 

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

 the same. 



