This is a short hairless annual which is also known as Wall Mustard and Stinkweed – it gives out an awful smell when crushed. The deep yellow flowers are 10 – 15mm, are arranged alternately up the stem and appear from June to September. Its leaves are mostly basal and are pinnately lobed. The round seeds are carried in two rows in cylindrical, glabrous pods with very short beaks. It grows mainly on sandy soils and is not very common. Thought to have been introduced into Ireland, Annual Wall-rocket belongs to the family Brassicaceae.
I first identified this little flower in August, 2007 at Kilmore Quay, Co Wexford and I photographed it on that occasion.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre