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. It reaches about tall and 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.