EXPLANATION OF PLATE II. 



1IEMIOATIPIIA. (1) riant of II. suhsqnarrnsa, natural she; (2) a spike- 

 let enlarged, with its bract ; (3) magnified scale of the same ; (5) a fln\\ er, 

 witli its single stamen and minute internal scale, niagnitied; (6) acliene, 

 magnified. 



LIPOOAlvPlI A. (1) Upper part of plants of L. maculata, with spikelets; 

 (2) diagram of a flower, representing the ovary between the two internal 

 scales, a >inglc stamen, the scale of the spikelet on one side, and the axis 

 of the spikelet on the other; (3) scale of spikelet detached ; (-1) a flower 

 with its two inner scales; (5) achene, magnified. 



FUIRENA. (1) Upper portion of plant of F. s [iiarrosa, var. pumila; 

 (2) scale of spike enclosing a flower ; (3) open scale of same ; (4) flower ; 

 (5) one of the scales and one of the bristles of the perianth ; (6) achene, 

 and (7) section of same. 



