58 



REGENERATION 



roots, thereby inhibiting the further growth of other roots in 

 nodes 1, 2, 3, and 4. These latter roots soon wilted and fell off. 



n 



In aip 



4 



Fig. 43. — The polar character of regeneration in the stem is not pronounced in 

 the beginning. Roots form at first in nodes 1, 2, 3, and 4, and shoots in the 

 most apical node 0, and the node below. Stem suspended in moist air. Oct. 

 18 to 23. 



In air 



Fig. 44.— The same stem as in Fig. 43 six days later (Oct. 29). The most 

 apicol node has grown vigorously, ehereby suppressing the growth of shoots in 

 node_,l below. Roots appear at the base. 



Figure 45 shows the powerful development of roots at the extreme 

 base and of shoots at the extreme apex, and the remnants of the 



