This plant is one of the strongest allergens in Europe.

Solidago? didn't know they are that horrible;-)

lovely sunny colour and fluffy looking

OK, Ok, they are used also against kidney stones and snake bites, but - allergens, too.

what's its name? the number of plants I don't recognise is much larger than the number of plants that I do know on sight!

Hi Fran@ It is Solidago canadensis, in Latin. I do not know common English name.

thanks, dear! that gives me something to check on

back - Wiki says it's Canadain Golden Rod
http://en.wikipedia.org/wiki/Solidago_canadensis