224 LEMNACES. 
Spatha nulla. Stamen unicum ad dehiscent. longiuscule ex- 
sertum. Filamentum. robustum cylindricum, cellolosum. Anth. 
terminalis subreniformis unilocularis secus diametrum brevi- 
us dehiscens, cellulis fibrosis donat. valvulis demum revo- 
lutis. Pollen sphericum glabrum. 
Pistillum subcentralo ovatum ex ovario ovato 1 loculari. 
Stylo subattenuato. Stigma sub simplex vix cellulosa. Ovu- 
lum unicum erectum. 
Testa cyathiformis crassa, apice apertissimo. Nucleus apice 
conico exserto. Fecundatione peracta frons gradatim mar- 
cescit, et demum fere annihilatur reliquis laxissimis. The 
seed having sunk to the bottom, and there formed a nidus. 
Semen ovato-rotundatum minutissimum. Testa apice aperta 
irregulariter ima basi brunnea ceterum albida, cellulis spira- 
liter dispositis, crassa, 
egumentum nucleare tenuissimum membranaceum apice 
conico brunneo coriaceo, e cellulis centrum versus radiantibus. 
Albumen paricum includens, Embryo cum apice nuclei sece- 
dens oblongum carnosum albidum indivisum inperforatum. 
Plumula centralis, frondiformis orbicularis planiuscule basi 
frondulum novellum minutissimum semi-fovens. 
The seeds germinate among debris of the fronds, as the 
embryo enlarges it becomes more firmly attached to the con- 
cealed apex of the nucleus, and by its growth at length tears 
this up from its original connexions. At this Stage the 
conical cap will be seen projecting beyond the very wide 
somewhat irregular mouth of the testa. 
The embryo continuing to grow to the upper portion, which 
is always rather large, protrudes, carrying with it the cap. 
In the early stage of protrusion that part immediately ad- 
joining the cap is annuliform or constricted, but it is strictly 
continuous with the body,although it is sub-separable, it is of a 
rather more dense nature, this it shares with the apex of the 
enclosed part. The Plumule is central and entirely enclosed, 
it is already green. As the growth proceeds the protruded part 
becomes much enlarged, and has a very cellular aspect, It 
