The humid and mild climate of Great Britain is good for plants and flowers. Some of them have become symbols in the UK. Probably you know that the poppyis the symbol of peace, the red rose is the national emblem of England, the thistle is the national emblem of Scotland and the Edinburgh International Festival. The daffodils and the leek are the emblems of Wales, the shamrock (a kind of clover) is the emblem of Ireland.
The flag of the United Kingdom, known as the Union Jack, is made up of three crosses. The upright red cross is the cross of St. George, the patron saint of England. The white diagonal cross is the cross of St. Andrew, the patron saint of Scotland. The red diagonal cross is the cross of St. Patrick, the patron saint of Ireland.