It started growing in a corner of my garden and I left it to see what it was, but I can't identify it, it's about 500mm high. SWMBO swears it's a weed!
I can't say I know what it is but the leaf looks familiar. I'm sure I've seen them in my garden but pulled them up before they've flowered.
If it is a weed then it isn't entirely unattractive.
If they were bunched together in a tub and mixed with something else it would look ok.