Diplotaxis muralis is a species of flowering plant in the mustard family known by the common name
annual wall-rocket. This plant is native to Europe, Asia, and Africa, but it is found throughout the temperate world, where it has naturalized. This is an erect mustardlike plant rarely reaching half a meter in height. It has lobed leaves and its stems are topped with dense inflorescences of yellow, or occasionally light purple, flowers with small oval petals...
(Wikipedia)