582 
A PPENDIX. [Botany of Terra Australis, 
consisting of bracteae and the hypogynous squamae as forming the perian- 
thium, it seems to follow, from the relation these parts have to the axis of 
inflorescence, that the outer series of this perianthium is wanting, while its 
corresponding stamina exist, and that the whole or part of the inner 
series is produced while its corresponding stamina are generally wanting. 
This may, no doubt, actually be the case, but as it would be, at least, con- 
trary to every analogy in Monocotyledonous plants, it becomes in a certain 
degree probable that the inner or proper envelope of grasses, the calyx of 
Jussieu, notwithstanding the obliquity in the insertion of its valves, forms 
in reality the outer series of the true perianthium, whose inner series con- 
sists of the minute scales, never more than three in number, and in which 
an irregularity in some degree analogous to that of the outer series gene- 
rally exists. 
It is necessary to be aware of the tendency to suppression existing, as 
it were, in opposite directions in the two floral envelopes of grasses to com- 
prehend the real structure of many irregular genera of the order, and also 
to understand the limits of the two great tribes into which I have proposed 
to subdivide it. 
One of these tribes, which may be called Paniceje, comprehends 
Ischaemum, IIolcus, Andropogon, Anthistiria, Saccharum, Cenchrus, 
Isachne, Panicum, Paspalum, Reimaria, Anthenantia, Monachne, Lap- 
pago, and several other nearly related genera ; and its essential character 
consists in its having always a Locusta of two flowers, of which, the lower 
or outer is uniformly imperfect, being either male or neuter, and then not 
unfrequently reduced to a single valve. 
Ischsemum and Isachne are examples of this tribe in its most perfect 
form, from which form Anthenantia, Paspalum, and Reimaria most remark- 
ably deviate in consequence of the suppression of certain parts: thus Anthe- 
nantia (which is not correctly described by Palisot de Beauvois,) differs 
from those species of Panicum that have the lower flower neuter and bival- 
vular, in being deprived of the outer valve of its gluma; Paspalum differs 
from Anthenantia in the want of the inner valve of its neuter flower; 
and from those species of Panicum, whose outer flower is univalvular, in 
the want of the outer valve of its gluma ; and Reimaria differs from 
Paspalum in being entirely deprived of its gluma. That this is the real 
