up and inundating, by the channels at the side of the rostellum, at least the most external pollen masses on each side. These pollinia emit their tubes over the rim of the rostellum, almost obliterating it, into the stylary canal. On the opening of the flower and the retraction of the anther-case, the most internal pollinia may sometimes be found in the condition of loose grains unaffected by the inundation of viscid matter. In its fertilisation this species of Eria seems to resemble Dendrobium chrysanthum.
The mode of fertilisation described as occurring in Ophrys apifera by Mr. Darwin, I found to be followed very closely by a species of Eria near to E. javensis, in which the anther-cap shrivels up backwards after rupturing, so as to disclose the
FIG. 26, FIG. 26a.
FIG. 26.a CHRYSOGLOSSUM SP. ; A, ANTHER-CAP ; B, POLLINIA IN SITU ; 0, STIGMA; D, UPPER MARGIN OF STIGMA; E, LOWER MARGIN OF STIGMA. FIG. 26a.a SECTION OF SAME. THE YISCID MATTER FLOWS OVER THE MARGIN, D, INTO THE ANTHER.
pollinia, which at once, even when quite shaded from wind and all other disturbances, begin a slow tortuous movement, during which they fall into their own stigmas, as seen in Fig. 23, p. 93.
In a species of terrestrial orchid unknown to me, but nearly related, if not belonging to the genus Clirysogiossum, I found these contrivances for effecting self-fertilisation carried to their extreme limit, by its fertilising itself without ever opening its florets at all (Figs. 25, 26). I observed them in the forest, as well as grew a few of them in Mr. Lasha s garden, atid every specimen was fertilised in the same way. In opening