have a look at floridata entry for common edible ginger (zingiber officinale):
http://www.floridata.com/ref/z...
it seems to me your leaves look very similar. if you google for the name you can find lots of info on growth, even in pots.
there is another edible ginger: galangal ( Alpinia galangal/Alpinia officinarum) used in thai/asian cuisine. it is taller then common ginger.
this link has a pic of flower also and info on growing too.
http://www.mynicegarden.com/20...
