Persicaria maculosa

Tracheophyta MagnoliopsidaPolygonaceaePersicariaPersicaria maculosa


An annual of open ground on a wide range of soils, particularly those which are rich in nutrients. It is found by ponds, lakes, streams and ditches, in waste places, on roadsides and railways, and is sometimes a pestilential weed of cultivated land. Mainly lowland, but ascending to at least 450 m near Garrigill (Cumberland) and in Clun Forest (Salop).



World Distribution

Eurasian Temperate element, but naturalised in N. America so distribution is now Circumpolar Temperate.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 6

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 7

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 14.6

Annual Precipitation (mm): 1077

Height (cm): 80

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 2578

Count of 10km squares in Ireland: 934

Count of 10km squares in the Channel Isles: 12

Atlas Change Index: -0.95

Weighted Changed Factor: -12

Weighted Change Factor Confidence (90%)


JNCC Designations