Fallopia dumetorum

Tracheophyta MagnoliopsidaPolygonaceaeFallopiaFallopia dumetorum


A climbing annual of hedges, thickets and wood-borders on well-drained soils. Erratic in appearance, it sometimes occurs in quantity following the felling, thinning or coppicing of hedgerows and woodland. Lowland.



World Distribution

Eurasian Temperate element.

Broad Habitats

Light (Ellenberg): 6

Moisture (Ellenberg): 5

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 7

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.9

July Mean Temperature (Celsius): 16.4

Annual Precipitation (mm): 784

Height (cm): 200

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 69

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.33

JNCC Designations


Scarce Atlas Account

Scarce Atlas Account: 

Fallopia dumetorum (L.) Holub


Status: scarce



This is a plant of woodland margins, open woodland, coppices and hedges on well-drained soils. 

It is an annual and probably largely self-pollinated. Plants produce an immense number of fruits which appear to remain viable for many years, Germination is stimulated by disturbance of the soil, and the species can appear in quantity when woods are felled or coppiced.

This species has always been local, but it has probably decreased in Britain over the last 30 years. The reasons for this are obscure, but the decline in woodland management may be partly responsible.

F. dumetorum occurs over much of Europe northwards to northern Sweden, but is scarce over much of the Iberian Peninsula and the Mediterranean region (Jalas & Suominen 1979). It extends eastwards across most of Asia. F. scandens (L.) Holub from North America may be conspecific.


J. R. Akeroyd

Atlas text references

Atlas (176c)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1979)
Lousley JE, Kent DH
1981.  Docks and knotweeds of the British Isles. Botanical Society of the British Isles Handbook no. 3.
Meusel H, Jäger E, Weinert E
1965.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
Stewart A, Pearman DA, Preston CD
1994.  Scarce plants in Britain.