160 



VANDE^. 



Chap. IV. 



which is shown closely attached to the rostellum in 

 the accompanying figure A. 



Fig. 25. 



POLLINIUM OF Ornithocepiialus. (From a sketch by Fritz Miiller.) 



A. Pollinium still attached to the 



rostellum with the pollen- 

 mass still lying in the cli- 

 nandrum on the summit of 

 the column. 



B. Pollinium in the position which 



it first assumes from the elas- 

 ticity of the pedicel. 

 Pollinium in the position ul- 

 timately assumed from the 

 hygrometric movement. 



The pedicel when freed suddenly bends into the 

 form represented at B, and soon afterwards owing to 

 the hygrometric contraction curls up into the odd 

 figure shown at C. When placed in water it resumes 

 the form represented at B. 



