Polygonum arenastrum

Tracheophyta MagnoliopsidaPolygonaceaePolygonumPolygonum arenastrum


A prostrate annual of open and trampled ground, especially of well-drained soils, on tracks, paths, roadsides and weedy pavements, around ponds and field gateways. 0-450 m (near Birkdale, Westmorland).



World Distribution

As an archaeophyte, P. arenastrum has a Eurasian Wide-temperate distribution; in recent centuries it has become widely naturalised outside this range.

© G. Toone, IWNHAS

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 5

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 6


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 14.9

Annual Precipitation (mm): 1008

Life form information

Height (cm): 20

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 1937

Count of 10km squares in Ireland: 480

Count of 10km squares in the Channel Isles: 10

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.