I've always thought of this plant, which grows in profusion by our little stream, as a sort of yellow nettle. But walking round the arboretum I found it has this name! I like the stripey grasses behind it.
Oh I think I get this in my garden - under a couple of big trees including a walnut - I've learnt to appreciate anything willing to grow there and it's pretty!
@tishpics Sorry I've deleted that now - it was meant to be for Hope Russell who had some intruders in the night at her house - I clicked on the wrong 'reply' - trust you haven't had a fright anyway!!!