Eupatorium cannabinum

Tracheophyta MagnoliopsidaAsteraceaeEupatoriumEupatorium cannabinum


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.).



World Distribution

European Temperate element; also in C. Asia.

© P. Shannon

Broad Habitats

Fen, marsh and swamp (not wooded)

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

Life form information

Height (cm): 150

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Comment on Clonality

a gregarious species (CTW)

Distribution information

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%)


Distribution information

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.

Atlas text references