314 



DARWINISM 



Fig. 30. — Orchis pyramidalis. 

 Description of Figure. 

 a ... anther. I r . . rostellum I V . guiding ridges on labellum. 



s,s ... stigma. | I . . labellum or lip. | n . nectary. 



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



B. Side view, with all the sepals and petals removed and the upper part of the flower 



C. The two pollinia attached to the saddle-shaped viscid disc. [bisected. 



D. The disc after the first act of contraction. 



E. The disc seen from above with one pollinium removed. 



F. The pollinia removed by the insertion of a needle into the nectary. 



G. The same pollinia after depression has taken place. 



