Chap. I. ORCHIS PYKAMIDALIS. 19 



Description op Fio. 3. 



a. anthor. 

 s,s. stigma. 

 r. rostellum. 



I. labellum. 



r. gniding plate on the labellum. 



». nectary. 



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



labellum. 



B. Side view, with all the sepals and petals removed, with the labellum 



longitudinally bisected, and with the near side of the upper part 

 of the nectary cut away. 



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



X>. The disc after the first act of contraction, with no object seized, 



E. The disc seen from above, and flattened by force, with one poUiniura 



removed ; showing a depression in its surface, by which the second 

 movement of the poUininm is effected. 



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



the saddle has clasped the needle by the first act of contraction. 

 Gr. The same pollinia after the second movement and their consequent 

 depression. 



