CHAP. IV. CIKCUMNUTATION OF FLOWER-STEMS. 225 



TrifoUum repens circumnutate in a complicated course during 

 several days. I may add that the gynophore of Arachis hypogwa, 



''40'a.m 23** 



TrifoUum subterrancum : main flower-peduncle, illuminated from above, 

 circumnutation traced on horizontal glass, from 8.40 A.M. July 23rd 

 to 10.30 P.M. 24th. 



which looks exactly like a peduncle, circumnutates whilst growing 

 vertically downwards, in order to bury the young pod in the 

 ground. 



The movements of the flowers of Cyclamen Persicum were not 

 observed ; but the peduncle, whilst the pod is forming, increases 

 much in length, and bows itself down by a circumnutating 

 movement. A young peduncle of Maurandia semperflorens, 

 li inch' in length, was carefully observed during a whole day, 

 and it made 4 2 narrow, vertical, irregular and short ellipses, 

 each at an average rate of about 2 h. '25 m. An adjoining 

 peduncle described during the same time similar, though fewer, 

 ellipses.* According to Sachs f the flower-stems, whilst growing, 



* * The Movements and Habits 

 of Climbing Plants,' 2nd edit., 



1875, p. 68. 

 t ' Text-Book of Botany,' 1875, 



