116 



NEOTTE^. 



Chap. IV, 



convex in front and concave behind, with its sharp 

 siimmit slightly hollowed out on each side ; it arches 

 over the stigmatic surface (fig. 18, A, r, s). Internally, 



Kig. 18. 



LiSTEBA OVATA, or Tway-blade. (Partly copied from Hooker.; 



ool. summit of column. 



a. anther. 



p. pollen. 



r. rostellura. 



5. stigma. 



/. labellum. 



«. Dectar-secrcting furrow. 



A. Flower Tiewed laterally, with 

 all the sepals and petals, except 

 the labellum, removed. 



15. Ditto, with the pollinia re- 

 moved, and with the lostellum 

 bent down after the ejection 

 of the viscid matter. 



