The Old Man's Beard (Clematis vitalba) hangs on into the new year when everything else has died back. It was said to do the Devil's work by climbing into other plants and choking them.
I don't know why it was also called "Travellers' Joy", but it was sufficiently attractive to stop me on our walk around Old Alresford.
Thanks. How did we ever manage without the internet? http://www.thepoisongarden.co.uk/atoz/clematis_vitalba.htm