Conium maculatum
Ecology
A biennial of damp places, such as ditches and river banks, and of drier habitats, including rough grassland, waste ground, rubbish tips and roadsides. It is a colonist of disturbed areas, particularly on dredged mud, sometimes forming large stands. Generally lowland, but reaching 305 m at Llynheillyn (Rads.).
Status
Trends
The distribution of C. maculatum is little changed since the 1962 Atlas, although the map suggests declines on the edges of its range. Conversely, local increases in its core areas have been reported, particularly in open habitats (Killick et al., 1998).
World Distribution
As an archaeophyte C. maculatum has a Eurosiberian Southern-temperate distribution; it is widely naturalised outside this range.
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Broad Habitats
Light (Ellenberg): 8
Moisture (Ellenberg): 5
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 8
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.9
July Mean Temperature (Celsius): 15.2
Annual Precipitation (mm): 915
Height (cm): 250
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Count of 10km squares in Great Britain: 1847
Count of 10km squares in Ireland: 476
Count of 10km squares in the Channel Isles: 13
Atlas Change Index: -0.02
Weighted Changed Factor: 13
Weighted Change Factor Confidence (90%)
JNCC Designations
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.