Buttercup, of the pernicious creeping variety.buttercups also have 5 petals ...
Robinia pseudoacacia?My sister wants this tree and has sent me a pic but I'm crap at trees
Any ideas?
Botanical Name:
Yucca gloriosa
Other names:
Palm lily, Roman candle, Tree lily, Adam's needle, Lord's candlestick, Mound lily
Genus:
Yucca
Species:
Y. gloriosa ~ y. gloriosa is a handsome architectural plant, with pointed upright leaves and tall white flower spikes.
http://beautifulgardens.shootgardening.co.uk/sitePlant.php?plantid=164
Oh I see - a garden escape then.It's not a native butterbur though.