So I know this is the weed forum, but lots of us with weeds grow herbs fruits and veggies. Any input is really appreciated...

So yeah, I planted strawberries last year. I was thrilled, I got a late summer crop. But I left them in shallow pots in canadian winter weather and they died. This spring I saw this little plant, swear it was a strawberry plant, though it was in the pot just next to the one with the strawberries in it, not actually in the exact same pot. But I thought probably a strawberry fell into the pot and germinated. I mean the leaves look just like strawberry plants so I was fairly confident about it being strawberry.

Then it grew a stem... I mean I thought strawberries didn't grow a central stem... and a little yellow flower. What is it? Anyone know?