EXPLANATION OF PLATE X. 



TRIODLV. — (1) Magnified spikelet of T. seslerioides ; (2) the same displayed 

 and the h)west flower open; (3) back view of the flowering glume spread 

 out. 



GRAPIIEPHOROr. — (1) A magnified spikelet of G. melicoides, disjdayed ; 



(2) a part of the hairv rhachis and one flower of the same. 

 DIAKKHENA. — (1) A spikelet of D. Americana, enlarged ; (2) the grain 



in its glume and palet. 

 DACTYLIS. — A spikelet of D. glomerata magnified and displayed. 

 KffiLERIA. — (1) A magnified spikelet of K. cristata, expanded, showing 



the empty glumes, the tliree flowers, and a rudiment; (2) lower half of a 



flowering glume, partly spread open ; it is much more folded and keeled 



in its natural condition. 

 EATONIA. — A magnified spikelet of E. ohtusata, expanded, showing the 



empty glumes, the two flowers, and a rudiment. 

 MELICA. — A magnified spikelet of M. mutica, expanded, sliowing tlie empty 



glumes, two perfect ihnvers, and an abortive one. 

 GLYCEIiIA. — (I) A magnified spikelet of G. nervata; (2) a sejjarate flower 



with one joint of the rhachis ; and (.'1) the lower half of a flowering 



glume, showing its form (rounded on tlie back, not keeled). 

 DLSTICIILIS. — (1) A pistillate spikelet of 1). maritima, enlarged; (2) a 



flower from the same ; and (3) a flower from a staminate spikelet. 

 P()A. — (1) Panicle of P. compressa, reduced in size; (2) a magnified sjiike- 



let ; (3) a separate flower more magnified; (4) a fiowering glume cut 



across and somewliat outspread. 

 EPAGKOSTIS. — (1) A si)ikelet of E. i)ilosa, enlarged; (2) the same, from 



which the glumes and all of six lower flowers except the palets have 



fallen away ; (3) a magnified fiower, open ; (4) the flowering glume of the 



same outspread. 

 BPIZA. — (1) A s])ikelet of B. media, enlarged; (2) a separate flower. 

 FESTUCA. — (1) A spikelet of F. elatior, enlarged; (2) a separate flower; 



(3) lower part of a flowering glume, outspread. 



BPOMUS. — (1) A spikelet of B. secaliuus, or Chess; and (2) a separate 

 flower, enlarged. 



