Hi all.

Can anyone please help me identify this plant. I've a couple of them
appeared in my borders this year. I've certinly not planted them myself so
presume they've seeded from the horse muck I mulched with earlier in the
year. They seem to grow to about 3ft tall. Not unattractive but I don't
particularly want too many more of them:

http://i248.photobucket.com/albums/g...5082009059.jpg
http://i248.photobucket.com/albums/g...5082009058.jpg

TIA

Clive in Kent