Chap. X. 



APOGEOTKOPISM. 



505 



the upward curvature cannot be due to heliotropism or hjpo- 

 uasty, but to apogeotropism. 



; 



Fig. 188. 



N. 



Oxalii camosa : moTements of flower-peduncle, traced on a vertical glass : 

 A, 4pina,stic downward movement ; B, circumnutation whilst depend- 

 ioft vertically ; C, subsequent upward movement, due to apogeotropism 

 and hvponasty combined 



