237 
Glands of the Plumhagineae . 
is the correct one. I have been unable to see the central 
cavity figured by Maury 1 ; and it is not easy to conceive of 
the secretion being pressed out en masse as he avers. 
It is usual to find in each of the four inner cells a refractive 
body which is probably a nucleus (Fig. 4, v.) The diameter 
of the orifice of the gland is -i mm., and the cells bounding it 
are usually the same as those of the general epidermis. 
Some striking departures from the normal condition are met 
with. On the flower-stalk of Statice prninosa the epidermal 
cells around the glands tend to become enlarged so as to 
form conspicuous rosettes. Side by side can be seen 
examples of all the transitional stages from the typical gland 
to that encircled by a mass -5 mm. in diameter, formed of 
three or more tiers of radiating cells (Fig. 4, i, ii, iii, iv, v). 
Similarly situated cells in Statice chrysocomia undergo modi- 
fication of a different character, the greatest development 
taking place on the under side, leading, in the ultimate case, 
to the gland being elevated on a bracket-like mass, *2 6 mm. 
in diameter, with its orifice directed upwards at right angles 
to the stem (Fig. 5, i, ii, iii, iv, v). In this species and in 
S. prninosa the greatest amount of modification is found at 
the upper portion of the rachis. No chalk-scales were found 
in connection with these glands, but they most likely occur in 
plants grown under certain conditions. In both these species 
the glands of the lamina are of the ordinary type. 
On both sides of the leaf of Statice rosea forms somewhat 
similar to those just described appear. A fully developed 
example, -4 mm. across (Fig. 6), is flanked on the lower side 
by a large cushion of stout-walled cells which forms a resting- 
place for a nodule of calcium carbonate of corresponding 
outline. All stages of the development of the cushion may 
be observed. Sometimes the orifice of the gland is over- 
arched by enlarged cells, even when there are few. The 
gland is often borne outward and upward, as in S', chrysocomia , 
until its surface is perpendicular to the leaf-blade. Although 
appearances justify the suggestion being made, it is not likely 
1 Maury, loc. cit., Pl. 5, Fig. 51. 
