B. nigra
B. nigra may refer to:
- Ballota nigra, a perennial herb of the family Lamiaceae
- Betula nigra, a species of birch native to the eastern United States from New Hampshire west to southern Minnesota, and south to northern Florida and east Texas
- Brassica nigra, the black mustard, an annual weedy plant cultivated for its seeds, which are commonly used as a spice
See also
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This disambiguation page lists articles associated with the same abbreviated species scientific name.
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