Possible Clues:

• Plant with prickly-edged leaves
• Prickly plant of lithest kind
• Scotland's national flower
• Emblem of
• Prickly plant with purple flowers
• Daisy's family member putting revised list in article
• Emblem seen in street in Leith, possibly
• Emblem in the list, after revision
• The coverage first lets start with a weed
• This will sound enough to prick your memory of Scotland