Brassicaceae: an annual to 1.5m, and superficially similar to Charlock. Found on arable and waste ground. The flowers are 15-20mm across, with 4 yellow petals, blooming from April-October. The seed pods are cylindrical, short-stalked, with a flattened beak. The leaves are pinnately divided. Sometimes cultivated but also found growing as a casual in Britain, especially in South East England. Native to the Mediterranean.
The leaves can be eaten raw or cooked, they have a hot pungent flavour, especially if eaten raw. The young leaves are used as a flavouring in mixed salads, whilst older leaves are used as a potherb. The seed can be sprouted and eaten raw like water cress.
The seed has antibacterial, antifungal, appetizer, carminative, diaphoretic, digestive, diuretic, emetic, expectorant, rubefacient and stimulant properties.
Sow seeds in situ from early spring to late summer. Germination can take less than a week, but could take longer if it is cold. The earlier sowings are for a seed crop, the later sowings are for edible leaves and green manure. Succeeds on most soils when growing in a sunny position.