Possible Clues:

• Scotland's flower
• Prickly plant (Carduus)
• Is Scotland's heart in the national emblem?
• It sounds as if this is going to have many points for the Scots
• Lithest sort of spiky plant
• National emblem is not that important, finally, to the French
• Emblem shifted in the list
• The aforementioned pig knocked over plant
• First line in the national symbol?
• Heraldic emblem of Scotland