xvm] INFLORESCENCE-FLOATS 229 



similar effect (Fig. 127, p. 197). The part played by the roots 

 in holding the stem of Oenanthe Phellandrium in an upright 

 position has already been mentioned 1 , as well as the specialised 

 branches which in some Bladderworts keep the inflorescence 

 erect 2 . Fig. 150 shows the whorl of six branches surrounding 



FIG. 150. Utricularia inflata, Walt. Part of swimming water shoot, with an 

 inflorescence axis bearing six floating organs. [Goebel, K. (1891-1893).] 



the flowering axis in Utricularia inflata. Spruce 3 , in his account 

 of his travels in the Amazon region, mentions, as a general obser- 

 vation, that those hydrophytes which rear themselves erect and 

 thus raise the flowering part of their stem well out of the water, 

 prove on examination to have the sub-aquatic leaves grouped 



1 See p. 204. 2 See p. 99. 3 Spruce, R. (1908). 



