OF NAIAS GRAMINEA, VAR. DELILEI. 



61 



the former tlie ends are more abruptly narrowed into the 



base and the beak than they are in the latter, which 



has gradually narrowing ends; compare figs. 86 & 87. 



Cesati's figures in ' Linnsea/ xxxii. plate 2, confirm this 



conclusion. 



Fig. 86, 



Fig. 87. 



The perianth easily separates from the fruit ; it is repre- 

 sented in fig. 88. The portion which covers the body of 

 the fruit consists of a single layer of cells. 



