Plate B. Pollination and fertilisation 





Fig. I. Orchis iiiasciila L. A. Side \iew of flower, sepals, petals, 

 half of lip and part of spur removed. B. Front view, sepals and 

 petals removed. C. Pollinium on its viscidium (viscid disc). D. 

 Viscidia in pouch of rostellum, its front pushed down. E. Section 

 through one side of viscidium. F. Pollen-packets with stretched 

 clastic threads. (Aftet Bauer. ) 



Fig. 2. Aiiacamptis pyramidalis Richaid. A. Front view of flower, sepals 

 and petals removed. B. Side view, sepals, petals, half of lip and part 

 of spur removed. C. Pollinia attached to strap-shaped viscidium. D. 

 Viscidium curling under with no object to grasp. E. Mscidium from 

 above, flattened, showing depression which eflicts downward move- 

 ment of pollinia. F. Pollinia removed on a needle. G. The same 

 after downward movement. The uppermost "/" should read "/'". 



a. anther. p. pollinium. 



c. caudiclc. r. rostellum. 



d. viscidium. /. stigmas. 



/. labellum. /'. guiding plalc. 



//. spur. 

 From D.'irwin's Various cotttrivaiices by whit^h oichiiis tin- Jcitili^fd, 



