1. 
   rheophyte
   rheophyte, rheophytic A plant inhabiting running water; a plant that is confined to flowing water.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1663/17
   
   
2. 
   Rheophyte
   A rheophyte is an aquatic plant that lives in fast moving water currents in an environment where few other organisms can survive. Rheophytes tend to be found in currents that move at rates of 1 to 2 meters per second and that are up to 3 to 6 feet deep. The amount of force such fast moving currents...
   Found op http://en.wikipedia.org/wiki/Rheophyte
   
   

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