I thought you were asking about the tree trunk in the same pot, lol
this is wild geranium, spreads very fast, keep it if you don't mind the "natural" look that many people here call "dirty", because this plant stays nice for just maybe a month, and after this turns into legs and dies off. A short lived annual and seeds very easily, so if you allow it soon it will take over a lawn, for a couple months a year.