I04 UTRICULARIA [ch. 



attribute to stems alone, viz. long continued apical growth^, 

 as well as power of bearing leaves and axillary branches and of 

 developing in more than one plane^. The fact that adventitious 

 shoots are produced on the leaves of other Lentibulariaceae is, 

 however, favourable to this view ^. The unique plasticity of the 

 Utricularias is indicated by the many observations on regenera- 

 tion phenomena in the genus, which show that almost any part 



Fig. 70. Utncularia vulgaris, L. Detached leaf with four adventitious shoots, 

 ^,^1,^2.^3- (Enlarged.) [Goebel, K. (1904).] 



of these plants can produce new shoots at will. For instance, 

 in U. neglecta^ detached leaves, or leaves connected with a dying 

 axis, can produce adventitious shoots which arise endogenously 

 at the points of forking of the leaves, or, more rarely, from the 

 stalks of the bladders*. Fig. 70 represents a case in which four 



1 Hovelacque, M. (1888). 2 Qoebel, K. (1891). 



3 Goebel, K. (1904). ^ Gluck, H. (1906). 



