your guess is alot better than mine, and from looking around that seems to be what it is, rotala indica, but then again there is like 10 different appearances of what they say is rotala indica so i have no idea
i usually go catch a bunch once a week to put in my 36 gallon, i took that one out and put it in the 2.5 gallon with my 5 cherry shrimp so i think ill keep them and see what happens, curious about how that mix will turn out