Ohai'. VI. MOVEMENTS OF THE POLLINIA. 159 



water, after both movements bad taken place ; and 

 the pedicel then moved into the same position which 

 it had at first assumed through its elasticity ; this 

 movement not being in any way affected by the 

 water. When taken out of water the hygrometric 

 movement of depression soon commenced for the 

 second time. 



In Rodriquezia secunda there was no hygrometric 

 movement of depression in the pedicel as in the before- 

 mentioned a. siiaveolens, but there was a rapid down- 

 ward movement, due to elasticitv, and of this I havft 

 seen no other instance ; for when the pedicel was put 

 into water it showed no tendency to recover its original 

 position, as occurred in many other cases. 



In Phalaenojpsis grandijiora and amahilis the stigma 

 is shallow and the pedicel of the rostellum long. 

 Some compensating action is therefore requisite, which, 

 differently from that in Maxillaria ornithorhyncha is 

 effected by elasticity. There is no movement of de- 

 pression ; but, when the pollinium is removed, the 

 straight pedicel suddenly curls up in the middle, thus 

 ( — ■'^—m ) . tlie full-stop on the left hand may re« 

 present the balls of pollen, and the thick hy]3hen to 

 the right may be supposed to represent the triangu- 

 larly shaped disc. The pedicel does not straighten 

 itself when placed in water. The end carrying the 

 balls of pollen is a little raised up after this elastic 

 movement, and the pedicel, with one end raised, and 

 with the middle part upwardly bowed, is well adapted 

 to drop the pollen-masses into the deep stigmatic 

 cavity, over a ledge in front. Fritz Miiller informs 

 me of a case in which the shortening "of a very long 

 pedicel is effected partly by elasticity and partly by a 

 hygrometric movement. A small Ornithocephalus, 

 growing in South Brazil, has a very long pedicel, 



