A Plant I Like

I do not know the name of this plant.  The flowers are a recent addition. Most of the summer the plant has been the sorta round green leaves below the flowers.  The leaves in the bottom left corner are from a hydrangea bush.  If you know the name of this plant, please feel free to let me know.  The temp today was a high of 61 F with 40 F expected tonight, so I hope these flowers are hardy.