CHAP. II. 
CUTICLE. 
43 
that the stomktes from which such glands arise are altogether 
imperfect ; for on the under side of the leaves of Dionaea we 
find other stomates of the usual figure and character. It is, 
however, worthy of remark, that here also there exists a great 
many imperfect stomates closed up by tufts of hairs springing 
from their orifice. 
Stomates are not found in Mosses, Fungi, Algae, or Lichens 
(see Introduction to the Natural System) ; in no submersed plants, 
or submersed parts of amphibious plants ; it is also said, not 
in Monotropa hypopithys, Neottia nidus avis, and Cuscuta 
europaea. They are not formed in the cuticle of plants growing 
in darkness, nor upon roots, nor the ribs of leaves. It fre- 
quently happens that they are found upon one surface of a 
leaf, but not on another, and generally in most abundance 
on the under side. In succulent parts they are neither rare 
nor wholly wanting, as has been constantly asserted; but 
are, on the contrary, as numerous as on many other parts. 
They may be generally seen upon the calyx ; often on the 
corolla ; and rarely, but sometimes, upon the filaments, an- 
thers, and styles. In fruit, they have only been noticed 
upon such as are membranous, and never upon the coat 
of the seed ; they exist, however, upon the surface of coty- 
ledons. 
Brown thinks that the uniformity of the stomates, in figure, 
position, and size, with respect to the meshes of the cuticle, is 
often such as to indicate the limits, and sometimes the affini- 
ties, of genera, and of their natural sections. He has shown, 
with his usual skill, that this is the case in Proteaceae. He 
also remarks, that on the microscopic character of the equal 
existence of stomates on both surfaces of the leaf depends that 
want of lustre which is so remarkable in the forests of New 
Holland. (Journal of the Royal Geogr, Society^ i. 21.) 
The same botanist is of opinion, that the two glands, or ra- 
ther bladders, of which a stomate is composed, are each analo- 
gous to the single bladders found occupying the inner face of 
the meshes of the cuticle. (Plate iii. fig. 9.) See the Memoir 
on the impregnation of Orchidece,) 
The following table of the proportion of stomates on the 
surface of various organs will serve to give some idea of their 
