fluoride treatment

[Monique Reed]

I seem to remember that Prayer Plants (Maranta leuconeura) are very intolerant 
of fluorine.  We were always instructed to avoid perlite in their potting mix 
for this reason.

M. Reed


>I'm doing a research project on the effects of fluoride-treated water on
>plants.  Can anyone please suggest what kind of plants to use -- small 
>and cheap, that would work well for this experiment?  Also, what range of
>fluoride concentrations would be best to test?