A foetid perennial herb of hedgerows, field-borders, walls, waysides and waste ground, often on disturbed nutrient-rich soils near habitations. Lowland, though it has been recorded as a casual at 480 m on Helvellyn (Cumberland).
Archaeological evidence suggests that B. nigra has been associated with human settlements since the Iron Age. It shows some small declines in the north and west, but many of these populations may only have been casual.
As an archaeophyte B. nigra has a European Southern-temperate distribution.
Light (Ellenberg): 7
Moisture (Ellenberg): 4
Reaction (Ellenberg): 8
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.8
July Mean Temperature (Celsius): 15.7
Annual Precipitation (mm): 797
Height (cm): 100
Perennation - primary
Life Form - primary
Clonality - primary
Count of 10km squares in Great Britain: 1365
Count of 10km squares in Ireland: 70
Count of 10km squares in the Channel Isles: 12
Atlas Change Index: -0.37
Weighted Changed Factor: 13
Weighted Change Factor Confidence (90%)
Atlas text references
1997. A Flora of Cumbria.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1978. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.