REGENERATION IN PLANTS 



not produce new leaf-buds at the sides, neither does it regenerate a 

 new apical bud at the end. 



A most interesting fact connected with the regeneration of the 

 higher plants is, as has been pointed out, that even when a callus is 

 formed over the cut-end, and new growth takes place from this callus, 



FlG. 35. After Vochting. A. Leaf-stalk of Begonia rex with a portion of the lamina. Sus- 

 pended with base upward. B. Piece of lamina of leaf of same. C. Leaf of Heterocentron 

 diver sifo I turn. D. Leaf-stalk of Begonia discolor. 



there is produced, not a single terminal bud, but a number of separate 

 buds. The piece does not complete itself, but produces new buds, 

 that make new branches. The explanation of this mode of regenera- 

 tion in plants is not known. It appears to be connected with the 

 production, by means of buds, of all the new structures. Why this 

 should occur we do not know, and the only suggestion that offers 



