Persicaria bistorta

Tracheophyta MagnoliopsidaPolygonaceaePersicariaPersicaria bistorta

Ecology

A perennial herb of base-poor soils in damp pastures, hay meadows and river-banks, in tall-herb communities in river valleys and on mountain ledges and roadsides. Many colonies originate as garden escapes or throw-outs. 0-430 m above Garrigill (Cumberland).

Status

Native

World Distribution

Eurasian Boreo-temperate element, in N. America native in west and naturalised in east so now Circumpolar Boreo-temperate.

© K.J. Walker, BSBI

Broad Habitats

Neutral grassland (includes coarse Arrhenatherum grassland)

Light (Ellenberg): 6

Moisture (Ellenberg): 7

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 6

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.3

July Mean Temperature (Celsius): 14.8

Annual Precipitation (mm): 1021

Height (cm): 80

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Rhizome shortly creeping

Count of 10km squares in Great Britain: 1355

Count of 10km squares in Ireland: 43

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.44

Weighted Changed Factor: -18

Weighted Change Factor Confidence (90%)

23

JNCC Designations

NBNSYS0000003750