Bunium bulbocastanum is a plant species in the family Apiaceae. It was once used as a root vegetable in parts of western Europe, and has been called great pignut or earthnut.
The plant is native to western Europe. It reaches about 60cm (20inches) tall and 25cm (10inches) wide, bearing frilly leaves and hermaphroditic flowers; it is pollinated by insects and self-fertile.
The small, rounded taproot is edible raw or cooked, and said to taste like sweet chestnuts. The leaf can be used as an herb or garnish similar to parsley.