1. Locals here in north Somerset call knapweed ‘cornflower’ [Yatton, Somerset, November 2016].
2.Games: Knapweed (Centaurea nigra) – twisted stem so that dead heads could be shot off … The same method [was] used with [ribwort] plantains [Greenstead Green, Essex, July 2011].
3. In the west of Ireland they commonly call Centaurea nigra hard heads [Natural History Museum, London, August 1994].
Images: main, Hyde Park, London, April 2014; inset, Burwash, East Sussex, July 2015.