244 
W. C. Worsdell. 
The only other alternative to the view above set forth is that a 
given group of plants, or small section of a group, could evolve 
independently, on its own account, a ncxv type of organ, possessing 
Fig. 15. Photograph of portions of two shoots of S. inequalifolia shewing 
rhizophores arising at the points of forking. 
