Sinapis arvensis, the
charlock mustard,
field mustard,
wild mustard, or
charlock, is an annual or winter annual plant of the genus
Sinapis in the family Brassicaceae. It is also sometimes referred to as
Rhamphospermum arvense and is found in the fields of North Africa, Asia, and Europe.
Pieris rapae, the small white butterfly, and
Pieris napi, the green veined white butterfly, are significant consumers of charlock during
(Wikipedia)