216 LEMNACES. 
In the development of the seed it agrees well with Grantia 
to which it likewise approaches in the sub-antitropism 
of the ovula. As far as I have hitherto examined, I find the 
apex of the nucleus becomes separable and resembles strongly 
that of Grantia. The embryo is similar, and the plantule 
has similar relations. Seed is developed in this much more 
frequently than in the other species. 
I believe the embryo to be solid, there is certainly an ap- 
pearance of a fissure at the radicular end when it is 
viewed as an opaque object, but I imagine this is due to the 
bulging out of the plumula. There is I think no canal in the 
cotyledon, although on pressure there is an appearance of it 
in immature embryos, this may arise from less development 
there, all development being centripetal. 
. Lemna minor. Oblongis frondibus (at one end provided 
with an intromarginal conical process,) e striatis. Radicula 
solitaria. 
Has. In aquis stagnantibus circa Calcuttam. 
Oss. Frons pallida, supra celluloso aspectu, subtus viridis, 
diametris 14 linea. Pollen glabrum. Ovulum solitarium, hilo 
fere basilari. 
2. Lemna major. 
Frondibus oblongis, orbicularibus, sepe subreniformibus 
supra lucidis striatisque. —Radiculis pluribus. 
In aquis stagnantibus. Multoties major, saturate viridis, 
subtus purpurascens, diametris maturis 3-2) lineis pluries 
prolifera. Pollen hispid. Stylus breviusculus. 
At an early stage, when the anthers are nearly sessile, these 
organs will be found to consist of the usual number of parts, 
which have the usual disposition, see figs. male column con- 
sisting of two vascular bundles, cupula incompletely vas- 
cular. 
The projecting apex of the nucleus is opaque, it is even 
now scarcely separable. А little later, and the usual enclo- 
sure takes place, adhesion at the same time taking place be. 
