EXPLANATION OF THE PLATES. 



Genera of Cyperaceae or Sedges. 



TAB. I. 



CYPERUS. Small plant of C. diandrus (1); a spike magnified (2); a piece of the 

 rhachis with one scale enclosing its flower (3); a separate flower more mag- 

 nified (4). C. erythrorhizos, a spike magnified, the lower scales and flowers 

 have fallen, showing the little internal, scales of the section Papyrus (5), 

 ' formed of the winged margins of the joints of the rhachis detached; a sepa- 

 rate one more enlarged (6); a flower (7); an achenium (8), cut in two. 

 C. dentatus, a piece of the rhachis of a spike with lower part of one scale, 

 showing how it is decurrent on the joint beneath (cut across) to form scale- 

 like wings (9). 



DULICHIUM. Upper part of a plant (1); part of a spike somewhat enlarged (2); 

 piece of rhachis and one scale decurrent on the joint beneath (3); magnified 

 flower (4). 



KYLLINGIA. Plant of K. pumfla (1); one-flowered spike on a piece of the rha- 

 chis, enlarged (2); the same more enlarged and open (3); achenium (4), and 

 section of same magnified (5). 



TAB. n 



HEMICARPHA. Plant (1), natural size; a spike enlarged, with its bract (2); 

 magnified scale of the same (3); a flower (5), with its single stamen and 

 minute internal scale, magnified; achenium (6), magnified. 



LIPOCARPHA. Upper part of plants with spikes (1); diagram of a flower, viz. of 

 ovary between the two internal scales, and single stamen, scale of the spike on 

 one side, axis of the spike on the other (2); scale of spike detached (3); a 

 flower with its two inner scales (4)5 achenium magnified (5). 



FUIRENA. Upper portion of plants (1); scale of spike enclosing a flower (2); 

 open scale of same (3); flower (4); one of the scales and one of the bristles 

 of the flower (5), achenium (6), and section of same (7). 



TAB. HI. 



ELEOCHARIS. Small plant of E. olivacea (1); the spike enlarged (2); detached 

 scale (3); flower (4); achenium and bristles (5). E. quadrangulata, spike (6),; 

 a scale (7); flower (8); achenium and bristles (9). E. tuberculosa; the 

 achenium with its great tubercle, and bristles (10). % 



SCIRPUS. Summit of plant of small S. debilis (1); a spike (2); a scale of the 

 (3), and flower (4); achenium with its bristles (5). S. (Trichophorum) 



