Chap. V. EPINASTY AKD HYPONASTY. 279 



10.30 P.M. it had descended to a point lower down by two-thirds 

 of the length of the figure as here given ; but from want of space 

 the tracing has been copied in B, only to a little after 6 p.m. On 

 the morning of the 9th the flower was withered, and the sub- 

 peduncle now stood at an angle of 57° beneath the horizon. If 

 the flower had been fertilised it would have withered much 

 sooner, and have moved much more quickly. We thus see that 

 the sub-peduncle oscillated up and down, or circumnutattd, 

 during its whole downward epinastio course. 



The sub-peduncles of the fertilised and withered flowers 

 of Oxalis carnoaa likewise bend downwards through epinasty, 

 as will be shown in a future chapter; and theii downward 

 course is strongly zigzag, indicating circumnutation. 



The number of instances in which various organs 

 move through epinasty or hyponasty, often in com- 

 bination with other forces, for the most diversified 

 purposes, seems to be inexhaustibly great ; and from 

 the several cases which have been here given, we may 

 safely infer that such movements are due to modified 

 circumnutation. 



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