698 EXPLANATION OF THE PLATES. 



GYMXOPOGON. — Inflorescence of G. racemosus, reduced in size (1); and a mag- 

 nified spikelet with the parts displayed (2). 



CYXODOX. — Inflorescence, of digitate spikes (1); a spikelet magnified and dis- 

 played, showing a perfect flower and a rudiment (2). 



DACTYLOCTENJUM.— Inflorescence of D. jEgyptiacum, of digitate spikes (1); 

 one of the spikelets magnified (2) ; the fruit magnified (3), showing the seed 

 loose in the thiu pericarp (utricle) ; and (4) the wrinkled seed more magnified. 



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

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

 flower from the last showing its parts (4); the fruit magnified, showing the 

 seed loose in the utricle (5); and the wrinkled seed detached (6). 



LEPTOCHLOA. — Small portion of the inflorescence of L. fascicularis (1); one of 

 its spikelets displayed and magnified (2) ; an open flower of the same (3). 



Tab. X. 



TRICUSPIS. — Magnified spikelet of T. seslerioides (1); the same displayed and 

 the lowest flower open (2); back view of the lower palets spread out "(3). 



GRAPHEPHORUM. — A magnified spikelet of G. melicoides, displayed (1); a part 

 of the hairy rhachis and one flower of the same (2). 



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



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



KCELERIA. — A magnified spikelet of K. cristata, expanded, showing the glumes, 

 the three flowers, and a rudiment (1); lower half of a lower palet, partly 

 spread open (2); it is much more folded and keeled in its natural condition. 



EATOXIA. — A magnified spikelet of E. obtusata, expanded, showing the glumes, 

 the two flowers, and a rudiment. 



MELICA. — A magnified spikelet of M. mutica, expanded, showing the glumes, two 

 perfect flowers, and an abortive one. 



GLYCERIA. — A magnified spikelet of G. nervata (1); a separate flower with one 

 joint of the rhachis (2); and (3) the lower half of a lower palet, showing its 

 form (rounded on the back, not keeled.) 



BRIZOPYRUM. — A pistillate spikelet of B. spicatum, enlarged (1); a flower from 

 the same (2); and a flower from a staminate spikelet (3). 



POA. — Panicle of P. compressa. reduced in size (1); a magnified spikelet (2); a 

 separate flower more magnified (3) ; a lower palet cut across and somewhat 

 outspread (4). 



ERAGROSTIS. — A spikelet of E. pilosa, enlarged (1); the same, from which 

 the glumes and all of six lower flowers except the upper palet have fallen 

 away (2); a magnified flower, open (3); the lower palet of the same out- 

 spread (4). 



BRIZA. — A spikelet of B. media, enlarged (1); a separate flower (2). 



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

 part of a lower palet, outspread (3). 



BROMUS. — A spikelet of B. secalinus, or Chess (1); and a separate flower, 

 enlarged (2). 



Tab. XL 



UXIOLA. — A spikelet of U. latifolia, of about the natural size (1); a flower, en- 

 larged (2) ; empty lower palet of the lowest (sterile) flower (3). 



PHRAGMITES. — A spikelet of P. communis, enlarged (1); one of the perfect 

 flowers, enlarged (2); and the lowest flower (3), which has stamens only. 



ARUXDIXARIA. — A spikelet of A. macrosperma (1); and a separate flower, mag- 

 nified (2). 



LEPTURUS. — Portion of the spike of L. paniculatus, enlarged (1); and a flower 

 magnified (2). 



