*Nigella Linnaeus. Subfamily: Ranunculoideae. Tribe: Nigelleae. Fennel-flower.
A genus of about 20 species, annual herbs, of Europe, n. Africa, and Asia.
Ref: Ford (1997d) In Flora of North America Editorial Committee (1997); Tamura In Kubitzki, Rohwer, & Bittrich (1993). Show full citations.
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