Barbarea (winter cress or yellow rocket) is a genus of about 29 species of flowering plants in the family Brassicaceae. Most are native to temperate regions of the Northern Hemisphere, with the highest species diversity in southern Europe and southwest Asia. They are small, herbaceous, biennial or perennial plants with dark green, deeply lobed leaves and yellow flowers with four petals.

29 species and three natural interspecies hybrids are accepted.

They grow into rosettes of edible cress foliage that resemble dandelion leaves. Barbarea verna, known as upland cress, early winter cress, American cress, Belle Isle cress and scurvy grass, is used to add a spicy taste to salads and mixed leaf greens for cooking.^{[additional citation(s) needed]}

Winter cress contains different glucosinolates, flavonoids, and saponins.