Seeds often used as the 'mustard' in mustard and cress. Hardy annual, native of India and Iran, growing to about eight feet. It grows in any soil, but, because of some of its other properties, can only be grown under licence. Hardy annual, native of Egypt, growing to about three feet. Does very well in a poor, dry soil in a sunny position.
Flower petals are a substitute for saffron.
Hardy deciduous shrub, native of Britain, growing to about 10 feet. Found wild in mixed woodland, scrub and hedgerows, preferring a calcareous soil. Can be grown as a hedge. Hardy, deciduous tree, native of Britain, growing to about 100 feet. Prefers a chalky soil and dislikes heavy, wet soils.