A Middle-Eastern spice plant related to buttercups, Nigella sativa, with dark black, aromatic seeds.
A spice plant related to caraway and cumin, with dark seeds and an edible root, Bunium bulbocastanum
These seeds as spice.
Nigella damascena, an annual flowering plant of the genus Nigella, the blooms of which are generally blue in colour, though also found in shades of pink, white or pale purple.