Possible Clues:

• Prickly plant, emblem of Scotland
• What sets down national emblem?
• From a crumpled list, put through the order
• The first fifty in order
• Here is what will, by the sound of it, do for Scotland
• National flower of Scotland
• It has so many points for Scotland
• The list includes Scottish emblem
• See 1
• Lithest kind of prickly plant