NAIAS. 185 
Fl. fem, axillaris vel subaxillaris nuda interdum squama, 
fol. junioris mentientis hinc illinc suffulta. Perianth. o. Pistil- 
lum ovato-oblongum, apice in stylo attenuat, Stylo bi-partito, 
lobis linearibus secus faciem internam denticulatis, stigmatosis. 
Ovulum 1, erectum 
Fructus, ovato-oblongus stylo terminat. Perianthium mem- 
branaceum. 
Semen erectum, testa e cuto cellul. membranac. tenuis. so- 
lubile, ceterum crassa, coriacea crustacea е cellulis creber. 
punctulatis induratis conflat. 
Tegumen interius, (secundine) tenuissim. 
Tegumen nucleare subchartaceo-membranaceum, apice sze- 
pius mamillat, 
Embryo erectus, radicula mediocri. Cotyledone rectus lon- 
gitud, seminis cavitat. Plumula intra rimam recondita. 
From previous examinations, I have some suspicion that 
the ovulum is formed before the pistillum, from the two scali- 
form parts of which it projects at à very early period. If 
this is the case, not only will there be an extreme similarity 
between the pistil and male flower, but it will be proof that 
a pistillum may be completely imitated by a centrifugal 
growth. 
I had named this species in allusion to the adhesion or 
union of the tunic, or perianth, to the male stamen ; this last 
being, when mature, reduced to a thin meinbranous bilocular ? 
sac, lining the cavity of the tunic. 
I have not been able to ascertain the existence of an em- 
bryonary sac, yet I believe that it exists, as a thin lining to 
the large cavity existing in the nucleus about the period 
immediately subsequent to the fecundation. 
e nucleus always appears to maintain its rounded apex, 
the mammilliform apex that generally becomes detached with 
it on dissection, being, I think, part of the neck of the inner 
membrane or endostome, with which the nucleus contracts at 
an early period, considerable adhesion. 
The radiating cells of the apex of the nucleus, are so far 
Y 
