318 ON NAIAS GRAMINEA DEL., VAR. DELILEI MAGNUS. 
In its early stage the lower, or flask-shaped, 
ortion consists of a globose or ovate body, 
ounte 
g. 67) 
divides about half-way up into two divisions, like” 
n (see fig. 70). 
fig. 88)—which can 
Fic. 70. portion which covers the long neck of the flask- 
shaped 
cells ; but the cells which occur on the margin 
divisions of the free ends are only one-third the length of the 
central cells, and their outer ends are somewhat enlarged so as to 
make the edge of the stigmatoid divisions minutely papillate, as if 
to afford better attachment for the 
grains of pollen (fig. 72). The cells 
a) e 
broader than any of those in other 
parts of the investing membrane, and 
they are also more loosely aggregated 
at that point. 
A central canal runs throughout 
the narrow portion which simulates 
the style, and at the point where it 
reaches the chamber which contaims 
ule it becomes slightly con- 
g. 71); 
\ aN 
Fic.71. Fic. 72. Fig. 73, below the constriction it widens out 
; into a cupola-shaped cavity, whose 
Upper portion or roof is lined with a few unicellular hairs (figs. 
= and 73). Below this cavity is the ovule. The accompanying 
rawings (figs. 67 to 78) illustrate the female flower in some of its 
stages of development. ; 
: ° portion of the pistilliferous flower bears any spines similar 
0 those which oceur on the bracts and leaves; such spines are 
Present in some of the species of Naias. 
