IN JAVJ, 



95 



up and inundating, by the channels at the side of the rostellum, 

 at kfist the most external pollen masses on each sirle. These 

 polliuia emit their tubes over the rim of the rostellum, almost 

 obliterating it» into the stylary canal. Ou the opening of the 

 flower and the retmction of the anther-case, the most internal 

 |>ollinia 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 Dendrohium 

 ehri/mnthum. 



The mode of fertilisation described as occurring in Ophrt/a 

 apifera by 3Ir. Darwin, I found to be followed very closely by 

 a species of Eria near to E. javenm, in which the anther-cup 

 shrivels up backwards after rupturing, so as to disclose the 



no- 20, FIG. 26a. 



riG, 2>>. — CHBI'SOGLOBSCSl BP. ; A, ANTHUB-QAP ; B, POLLINIA IK SlTU J (\ 

 STltlMA ; U, TTFrBB UABCIS OF STiaMA ; K, LOWBH if ABGIN OF 

 CTl^ilA. Fl«. 26a.— EEtmOSi OF SAME. T1£B VlSCm MArr£A FLOWS 



poUinia, 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, t\s seen in Fig, 23, p, 93, 

 In a species of terrestrial orchid unknown to me, but nearly 

 related, if not belonging to the genus Cknjsofjhssumf 1 

 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, 20). I observed them in 

 the furest, as well as grew a few of them in Mr. Lash s garden, 

 and every specimen was fertilised in the same way. In ojiening 



