1 Red Dead-nettle – crimson-purple flowers, square stem and pungent smell. Thanks to MB for pointing out that this is not Field Woundwort.
2 Green Alkanet – a member of the forget-me-not family with blue flowers. It is common in damp shady areas.
3 White Dead-nettle – has leaves that look like a common nettle with white flowers, but they do not sting.