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Species · Flowering plants

Sea knotgrass

Polygonum maritimum

52Records since 2000
AugustPeak month
3Counties with records

When it is recorded

Jan1
Feb0
Mar0
Apr0
May6
Jun7
Jul10
Aug17
Sep6
Oct3
Nov1
Dec1

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

Where it is recorded

#CountyNationRecordsShare
1Dorset England29
2Portsmouth England16
3Cornwall England2
50 England

Records per county (GADM level 2) and per nation; one record can count towards several areas. 3 counties in all.

About this species

Records since 2000
52
Peak month
August
Counties with records
3
Scientific name
Polygonum maritimum
Group
Flowering plants
NBN Atlas records since 2000
81
Conservation designations
Wildlife and Countryside Act 1981, GB Red List (2001 IUCN criteria)
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Caryophyllales
Family
Polygonaceae
Genus
Polygonum
Name with authority
Polygonum maritimum L.

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · GBIF 8195379