GENERAL REMARKS, 133 
its being attached to the ovary a little above its base; if 
this is true we shall find species with three abortive stamina, 
and the three ovaria. 
Acorus may be explained on the same principle as equitant 
leaves, as the plant has equitant leaves, itis bound by law 
to have the spatha similarly organised. 
Pistia will approach to genuine Aroidee which have the 
base of the spatha of more permanent texture, and toAm- 
brosinia in particular, in the two partitions of its spatha. It 
agrees with them in being Monadelphous, but not in its an- 
thers, which are not adnate, as those are, although they open 
in the same way in the presence of intermediate glands, and 
would seem to point out, that to each flower of each sex, there 
should be some corresponding body. 
The involutivo-convolute estivation is the typical form in 
Aroidie, and is at its maximum in Cryptocoryne, in which it 
is curiously modified, for while one lamina is highly involute(Pl. 
CLXXIII. Fig. II., la midrib, b outer lamina) the other 
passes over it, and terminates opposite to its origin, from the 
thick cellular cavitated midrib, at the very base of the lamina 
(РІ. CLXXIIT. Fig. П. 3.) both are equal, but there is a ten- 
dency to one becoming internal, on which the subsequent mo- 
dification depends (Pl. CLX XIII. Fig. II. 2.) 
The venation is, as it were, intermediate, the primary veins 
being Monocotyledonous. The secondary being obliquely: 
transverse, it is much more Monocot. than Dicotyledonous. 
There are traces of pellucid glands of a linear oblong figure. 
Each new leaf is embraced by two alternate sheaths, of which 
the lower is opposite to the next lowest leaf but one; the upper 
opposite to the next leaf, nothing is developed from the axils 
of these sheaths. 
What are they ?, are they-analogous the ligula of grasses, 
differing only in being in themselves distinct ? The situation is 
against their being bud scales, for they appear to be truly 
opposite to their respective leaves. These require further 
examination. 
