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Species · Flowering plants

Knotgrass

Polygonum aviculare

7,179Records since 2000
AugustPeak month
119Counties with records

When it is recorded

Jan23
Feb10
Mar9
Apr72
May299
Jun915
Jul1,499
Aug1,582
Sep962
Oct289
Nov48
Dec20

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Worcestershire England1,323
2Sefton England328
3Suffolk England193
4Oxfordshire England191
5Norfolk England134
6Cambridgeshire England121
7Telford and Wrekin England106
8Argyll and Bute Scotland104
9Essex England94
10Herefordshire, County of England91
11Portsmouth England88
12Halton England81
13Sheffield England72
14Highland Scotland71
15West Berkshire England71
5,833 England434 Scotland99 Wales8 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 119 counties in all.

About this species

Records since 2000
7,179
Peak month
August
Counties with records
119
Scientific name
Polygonum aviculare
Group
Flowering plants
NBN Atlas records since 2000
86,513
Conservation designations
GB Red List (2001 IUCN criteria)
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Caryophyllales
Family
Polygonaceae
Genus
Polygonum
Name with authority
Polygonum aviculare L.
Contributing datasets
49

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · GBIF 7821030