Eupatorium cannabinum
Ecology
A perennial herb found on base-enriched soils in a wide range of damp or wet habitats, including marginal vegetation by ponds, lakes, rivers and canals, tall-herb fen, fen-meadows, marshes, wet woodland, mires and wet heath; also flushed areas on sea-cliffs and in dune-slacks. It is infrequent in dry habitats, but is found in dry woods and on hedge banks, on waste ground, and even on dry chalk banks. 0-350 m (Ystradfellte, Brecs.).
Status
Trends
The distribution of E. cannabinum has shown little change since the 1962 Atlas.
World Distribution
European Temperate element; also in C. Asia.
Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 8
Reaction (Ellenberg): 6
Nitrogen (Ellenberg): 7
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.9
July Mean Temperature (Celsius): 15.2
Annual Precipitation (mm): 974
Height (cm): 150
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Count of 10km squares in Great Britain: 1715
Count of 10km squares in Ireland: 410
Count of 10km squares in the Channel Isles: 11
Atlas Change Index: -0.15
Weighted Changed Factor: -6
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.
Comment on Clonality