An unknown potted Cryptocoryne species including several runners that could be cut off and replanted too.  These have been easy to grow in my bare bottom tanks.  This was started from a replanted runner in my fishroom and now takes up considerable space in a 40 breeder tank.  I don't do anything than adding a very occasional root tab and some occasional Flourish Excel to keep algae from starting.  No fertilizing, no CO2, no special soil, only LED shop lights above the tanks.  My water is very hard.   The pot is 4" diameter.   This plant is getting root bound.   You could keep it as is, or you could split it up and replant in multiple new pots.   Nuisance snails are guaranteed.  The plant comes from a rainbowfish growout tank.