flower - a plant cultivated for its blooms or blossoms

genus Nigella - erect annual Eurasian herbs

Nigella damascena, love-in-a-mist - European garden plant having finely cut leaves and white or pale blue flowers

fennel flower, Nigella hispanica - nigella of Spain and southern France

black caraway, Nigella sativa, nutmeg flower, Roman coriander - herb of the Mediterranean region having pungent seeds used like those of caraway