It looks like a plant we call rosebay willow herb. It is a wild flower/weed here.

Thank you, Seaburngirl! It is only in one flower bed, and I have searched my garden but it is nowhere else! There are about 6 large clumps and they are getting bigger. If it is a weed, then I want to remove it because I am planting new plants today!

I'd definitely remove it, if you let it flower and seed you'll never be rid of it!

I to say definitely remove you don't want that in your garden at all.

Thanks kindly, everyone! I removed them today! I was amazed at the size of the roots.........tubular bulbs! Huge! I have no idea how these plants made their way into my garden. I guess the birds and the bees helped, and the wind of course. I always appreciate your help.