Corncockle  (Agrostemma githago)

This attractive tall cornfield plant has purple flowers which occur singly on the top of long stalks, the leaves are long and pointed and always grow opposite another leaf (4). Before the petals open, they are folded like flags (6). The spiky sepals project out beyond the petals; this feature may have earned the plant the local name of 'puck needles' in Sussex. Other local names include 'crown of the field' in Somerset and 'Popple' in Scotland, a name that dates from the Middle Ages (7).