Each country in Britain has its own floral emblem.

The national flower of England is the rose. The flower has been adopted as England's emblem since the time of the Wars of the Roses - civil wars (1455-1485) between the royal house of Lancaster (whose emblem was a red rose) and the royal house of York (whose emblem was a white rose).

The national flower of Scotland is the thistle, a prickly-leaved（adj. 葉子多刺的）purple flower which was first used in the 15th century as a symbol of defence. The Scottish Bluebell is also seen as the flower of Scotland.

The national flower of Wales is the daffodil, which is traditionally worn on St. David's Day（圣大衛(wèi)日）. The vegetable called leek（n. 韭蔥）is also considered to be a traditional emblem of Wales.

There are many explanations of how the leek came to be adopted as the national emblem of Wales. One is that St David advised the Welsh, on the eve of battle with the Saxons, to wear leeks in their caps to distinguish friend from foe. As Shakespeare records in Henry V, the Welsh archers wore leeks at the battle of Agincourt in 1415.

The national flower of Northern Ireland is the shamrock, a three-leaved plant similar to clover. An Irish tale tells of how Patrick used the three-leafed shamrock to explain the Trinity（n. 三位一體）. He used it in his sermons to represent how the Father, the Son, and the Holy Spirit could all exist as separate elements of the same entity. His followers adopted the custom of wearing a shamrock on his feast day.