When it is recorded
Jan0
Feb2
Mar1
Apr12
May35
Jun97
Jul140
Aug166
Sep71
Oct13
Nov2
Dec0
GBIF records by month, 2000–2025 (all years combined).
Where it is recorded
| # | County | Nation | Records | Share |
|---|---|---|---|---|
| 1 | Powys | Wales | 47 | |
| 2 | Monmouthshire | Wales | 44 | |
| 3 | Liverpool | England | 37 | |
| 4 | Worcestershire | England | 33 | |
| 5 | Fermanagh and Omagh | Northern Ireland | 32 | |
| 6 | Norfolk | England | 27 | |
| 7 | Suffolk | England | 18 | |
| 8 | Newry, Mourne and Down | Northern Ireland | 17 | |
| 9 | Warrington | England | 16 | |
| 10 | Cambridgeshire | England | 12 | |
| 11 | Herefordshire, County of | England | 11 | |
| 12 | Essex | England | 9 | |
| 13 | York | England | 8 | |
| 14 | Northamptonshire | England | 7 | |
| 15 | East Riding of Yorkshire | England | 6 |
376 England6 Scotland132 Wales64 Northern Ireland
Records per county (GADM level 2) and per nation; one record can count towards several areas. 47 counties in all.
About this species
- Records since 2000
- 585
- Peak month
- August
- Counties with records
- 47
- IUCN Red List
- Least Concern
- Scientific name
- Spirodela polyrhiza
- Group
- Flowering plants
- NBN Atlas records since 2000
- 2,905
- Conservation designations
- GB Red List (2001 IUCN criteria)
- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Class
- Liliopsida
- Order
- Alismatales
- Family
- Araceae
- Genus
- Spirodela
- Name with authority
- Spirodela polyrhiza (L.) Schleid.
- Contributing datasets
- 23
Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q154500 · GBIF 4097481