Posted: 25/06/2014 at 22:50
This forum rarely fails to ID a plant eventually but we're not so good at getting rid of some of them.
I found some of this today after I'd hacked my way through blackthorn and alder suckers, got OH to take the Allen scythe through some long grass, pulled off loads of goose grass and ivy and there it was, looking very cheerful. Anything else would have been dead.
It loves a bit of moist soil and it's had that for about a year now. It will have been under water twice.