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The folded leaf-segments of both species are soon covered on their 
inner and outer surfaces with a layer of mucilagenous water, but 
the secretion is not so abundant as in the other plants. In this case 
I did not succeed in producing the formation of drops. 
Hence the glandular hairs, which in the capitula of Dahlia secrete 
water and those of Cosmos glucose, secrete a watery mucilage when 
they occur on the leaves. In this mucilage I could not find glucose, 
either in Dahlia or in Cosmos. 
Melandrium album Garcke, (Lychnis vespertina Sibth.). 
The female form of Melandrium album may also be reckoned 
among plants with watercalyces, but here there is the peculiarity 
that the secreted water takes the place which elsewhere is occupied 
by the nectar. 
If a completely closed, immature flowerbud of the female plant 
be opened, the claws of the petals, and the walls of the ovary and 
calyx are found to be covered with numerous drops. 
On superficial inspection the flower might be considered very rich 
in nectar, but if these droplets are sucked up by a strip of filter 
paper in order to test the paper with Fehling’s solution for nectar 
on the slide, not a trace of glucose is found. 
In the male flower the various enclosed parts are also covered 
with numerous drops of liquid, long before the bud is ready to 
open, but here the droplets consist of nectar, which is secreted from 
the fleshy ring at the base of the stamens. 
In other respects the nectary of the female flower appears fully 
developed; it resembles that of Melandrium rubrum, both in shape 
and in size, but it does not produce nectar, and the tissue is free 
from glucose. 
A comparison of the two sexual forms of Melandrium album 
further shows that the female calyx, which is a little larger than 
the male and is somewhat constricted towards the top, is thickly 
covered on its inner surface with two kinds of hairs i. e. with elon¬ 
gated hairs of 3—4 cells, which terminate in a rounded gland-cell 
and with very similar hairs, which do not bear a gland-cell and 
terminate in a pointed apical cell. 
These two kinds of hairs are not found on the inner surface, of 
the calyx-tube; the margin and the inside of the limb alone are 
covered with glandular hairs. 
Similar hairs, but generally having a somewhat longer stalk, cover 
nlso the outside of the calyx in both sexual forms. 
After fertilisation, when the corolla has fallen off, the young fruit 
