314 



DARWINISM 



Fig. 30. — Orchis pyraniidalis. 

 Description of Figure. 

 a ... anther. | r . . rostellmu 1 I' . guiding ridges on labellum. 



StS ... stigma. | I . . labellum or lip. 1 n . nectary. 



A. Front view, with all the sepals and petals removed, except the labellum. 



B. Hide vii-w, with all the sepals and petals lemoved and tlie upper jiart of the flower 



C. The two ])ollinia attached to the saddle-shaped viscid disc. [bisected. 



D. The disc after the first act of contraction. 



iE. Tlie disc set;u from above with one poUinium removed. 



F. Tlie polliiiia removed by the insertion of a needle into the nectary. 



G. The same pollinia after depression has taken place. 



