I almost pulled this way too many times, but curiousity got the better of me. It finally bloomed... what is it?! It don't look like any weed I know.
wow thats not a weed i dont know what it is but its nice. hope it seed for you so you can have more. wow i wish i had unexpected guests. Imzadi
Crimson it looks like a campanula. I'd guess that it was a deformed bloom on campanula medium. The next flowers might be more showy.
Poppysue.... the rest of the blooms are far nicer, think your right about the Campanula Medium... it's really amazing how things "migrate" in my garden, I definately didn't plant it there (it blocks my faucet) can I move it without killing it?
I think it's a little late to move it now. I'd cut it back if you did... and it would probably be okay. I'm guessing it wouldn't have any trouble blooming again since it re-blooms if you cut off the spent flowers.