116 



NEOTTE^. 



Chap. IV, 



convex in front and concave behind, with its sharp 

 summit slightly hollowed out on each side ; it arches 

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



Fig, 18. 



LiSTERA OVATA, or Tvvay-blade. (Partly copied from Hooker.; 



