240 Wilson . — The Mucilage- and other 
Maury has already drawn attention to their occurrence on 
the cotyledons of Acantholimon , Statice, Armeria and Plum- 
bago, even before the light is reached by the germinating 
seedlings. 
Aegialitis is the only genus in the order in which the 
typical Mettenian glands are not found. In place of these 
there occur in great numbers, on the leaves (especially the 
upper surface), stems, bracts and sepals, sunk glands (Fig. 16) 
displaying greater complexity of structure than is found in the 
type. They will be returned to in the sequel. 
Mucilage-Glands. 
Statice. 
While in the most marked cases Mettenian glands render 
their existence very conspicuous by reason of the calcium 
carbonate secreted on the surface of the lamina of the leaves, 
the mucilage-glands make their presence equally noticeable 
by the large quantity of transparent, colourless, viscous 
secretion poured forth at the base of the petioles. As 
already remarked, the latter feature specially character- 
ises Statice rosea. It is equally noteworthy in the section 
represented by fruticans (Fig. 3). This species, when in 
full vegetative vigour, has very large leaves radiating in all 
directions, and the portion of the stem bearing them is then 
enveloped in a thick layer of mucilage. Its leaf-bases are 
largely developed for the purpose of support ; and they clasp 
the stem in such a way as to form axillary troughs of con- 
siderable capacity (Fig. 3, tr). In all species of Statice the 
leaves are more or less amplexicaul. The leaves themselves 
vary very much in form and size. Besides those already 
indicated, some distinct examples may be instanced, e. g. 
S.pubemda (Fig. 17), S. axillaris (Fig. 18), and S . cylindrifolia 
(Fig- 
Mucilage-glands were found in the axils of every species 
of Statice examined. In the different cases they vary only 
in respect of size and number. They are easily seen by 
