Conyza sumatrensis

Tracheophyta MagnoliopsidaAsteraceaeConyzaConyza sumatrensis


A tall and very conspicuous annual of well-drained, open and disturbed ground, such as waste land, railway-sides and docks, chiefly around towns. It also occurs as a wool casual. Lowland.



World Distribution

Native of S. America; widely naturalised in Europe.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 7


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 4.2

July Mean Temperature (Celsius): 16.5

Annual Precipitation (mm): 716

Life form information

Height (cm): 100

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Distribution information

Count of 10km squares in Great Britain: 154

Count of 10km squares in Ireland: 1

Count of 10km squares in the Channel Isles: 12

Weighted Changed Factor: 88

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

de Bolòs O, Vigo J
1995.  Flora dels Països Catalans, III. Pirolàcies-Compostes.
Wurzell (1988