What is the national emblem of Scotland?

Common throughout the highlands, islands, and lowlands of Scotland, the prickly purple thistle has been Scotland’s national emblem for centuries. This proud and regal plant, which grows to a height of five feet, has no natural enemies because of the vicious spines that cover and protect it like a porcupine. There are several different legends that tell how the thistle became Scotland’s symbol, but most date from the reign of Alexander III and in particular the events surrounding the Battle of Largs in 1263.

Source: The Historic and Heritage Accommodation Guide