Chap. IV. CIECUMXUTATION OF FLOWER-STEMS. 225 



TrifoHum ri-prns circumnutate in a complicated course during 

 Beveral days. I may add that the gynophore of Arachis hypogaa. 



Fig. ea. 



tfMf.a.m.Si¥ 



gM'a.m.SiV 



'flf.30'j^m.S4¥ 



Trifolium subterraneum : main flower-peduncle, illuiriuated from above, 

 bircumnutation traced on horizontal glass, from 8.40 A.K. 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 Ptrsicum 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, 

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

 and it made 4^ 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 Plauts,' 2nd pdlt., 



1875 p. 68. 

 t ' Text-Book of Botany,' 1875^ 



