EXPLANATION OF PLATE I. 



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CYPERUS. (1) Small plant of C. diandrus ; (2) a spikelet magnified ; (3) a 

 piece of the rhachis with one scale enclosing its flower; (4) a separate 

 flower more magnified. (5) C. erythrorhizos, a spikelet magnified ; the 

 lower scales and flowers have fallen, showing the small internal scales of 

 the section Papyrus, formed of the winged margins of the joints of the 

 rhachis detached ; (6) a separate one, more enlarged ; ( 7 ) a flower ; (8 ) an 

 achene, cut in two. (9) C. dentatus, a piece of the rhachis of a spike 

 with the lower part of one scale, showing how it is decurreiit on the joint 

 beneath (cut across) to form scale-like wings. 



DULICHIUM. ( 1 ) Upper part of a plant of I), spathaceum ; (2) part of a 

 spikelet somewhat enlarged ; (3 ) piece of rhachis, and one scale decurrent 

 on the joint beneath ; (4) magnified flower. 



KYLLINGA. (1) Plant of K. pumila; (2) one-flowered spikelet on a 

 piece of the rhachis, enlarged; (3) the same, more enlarged and open; 

 (4) achene ; and (5) section of same magnified. 



