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large water-dwelling plant, leaves feel and look a bit like plastic
small 'pond' of about 7 to 8" deep, tropical climate
SukanyaDatta, thanks for your suggestion, but I dont think this is the one: the flower petals of this spotting are way thicker than the ones of Eichornia crassipes. also, they lack the distinct, brigt yellow/orange spot.
Water hyacinth
Eichhornia crassipes
https://en.wikipedia.org/wiki/Eichhornia...