In addition to the daffodil (Narcissus cvs) the Welsh also use the leek (Allium porrum) as a national emblem.
The larger image here shows a rather dessicated leek placed at the base of the Guards Memorial, St James’s Park, City of Westminster, London. Presumably it was put there on St David’s Day (1 March) in honour of the Welsh Guards.
Photograph taken 25 March 2015.