Sorrels grow wild throughout Europe and Asia. There are a few native American kinds, but the common species from the Old World are now naturalized. The main European wild species are common sorrel, Rumex acetosa; and round-leafed or French sorrel, R. scutatus. These have been eaten as green vegetables since ancient times. Even in the 20th century English schoolchildren would eat ‘sour dabs’, sorrel picked from the wild.