This is a sweetly scented little perennial which only grows 20cm high and is found on waste ground, on dry walls, in hedgerows and on shingle beaches. A garden escape, it is now naturalised, particularly in the sunny south-east. The white flowers (5-6mm across) have 4 petals and 4 sepals, are borne in dense, terminal clusters and bloom from June to September. The leaves are hairy, grey-green with untoothed margins and, like the stems, are covered in soft hairs. The downy seeds are in small oval pods. This plant belongs to the Brassicaceae family.
My first record of this plant is in Tullycanna, Co Wexford in 2008 and I photographed it at that time.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre