GENERAL REMARKS. 129 
masculi, Stam. 3, basi cum pistillo cohzrentia, vel epigyna. 
Styli 3. Stigmata totidem. Capsula 1 locularis oligosperma. 
Semina reticulata. Embryo minutus in apice lbuminis lo- 
catus, —— ! 
This decided tendency to unisexuality is of importance, as 
otherwise it would tend to weaken the distinction between 
Acoroidem, and Aroidee. And here it may be asked, are not 
all naked flowers unisexual?. Of Achlamydeous Orders, in- 
cluding both Dicotyledons and Monocotyledons, there are I8, 
out of which 4 are described as hermaphrodite ; the proportion 
thence being 1 to 4}, so that we have analogy in favour of our 
supposition. If, as I imagine we can, deduce any thing fa- 
vourable from the situation of the stamina, we find that out of 
the four usually described as hermaphrodite, one (Cloranthez) 
has the stamina constantly unilateral, and two, Piperaceze, 
and Podostemee, (the former certainly simple by abortion), 
have them most frequently so, hence there only remains 
one, Saururez, from which nothing favourable to the above 
view can be deduced. à 
In the anatomy of its stem, Houttuynia is decidedly Dico- 
tyledonous, and with the exception of an adhesion of the' 
bark*? to the ligneous system.f The ceatral cellular por- 
tion, or pith is very large, and the cells are loaded with amyla- 
ceous granules ; around the circumference of this, is ‘situ- 
ated the woody system, which consists of two parts, the inner 
system, consisting sometimes of distinct fascicles, composed of 
vessels surrounded by punctated woody fibres, the innermost 
of which are spiral: the outer system is continuous, and com- 
posed of punctated woody fibre alone. The bark is rather 
thick, and is provided with a distinct cutis. 
The stomata present no peculiarity. The venation of the 
leaves is Dicotyledonous, as is likewise their aspect, 
* Or outer thick cellular integument, the cells of which are loaded 
with a pink fluid. : 
t Such adhesion is not uncommon in herbaceous dicotyledons, 
R 
