Dipsacus fullonum Common or Fuller's teasel
This thistle is native to Eurasia and North Africa but is now found worldwide. It is a herbaceous biennial and dies after seeding. The seeds are a great source of winter food for the European Goldfinch. It was used in the textile industry and useful for raising the nap on fabrics. It grows from 50cms to 2m tall and flowers (pale purple to white) from May to September.