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Crassula aquatica (L.) Schönland

Pigmyweed

Native records: 45 botanical areas

Amur, Alaska, Austria, 42 more areas

See all areas

Natural distribution

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NativeIntroducedUncertain

Distribution is shown as WGSRPD Level 3 areas. It does not imply the species occurs throughout an entire area.

Last updated:

Distribution last verified:

See sources

Photograph of Crassula aquatica

An annual / helophyte of temperate climates. Native to Russia, United States, Canada, Mexico, China, Åland Islands and elsewhere.

This entry carries only the classification and distribution data recorded in WCVP. A written account is not yet available.

Distribution areas

  • Åland Islands

    • FinlandNative

  • Austria

    • AustriaNative

  • Bolivia, Plurinational State of

    • BoliviaIntroduced

  • Canada

    • British ColumbiaNative
    • NewfoundlandNative
    • Northwest TerritoriesNative
    • Nova ScotiaNative
    • OntarioNative
    • Prince Edward I.Native
    • QuébecNative

  • China

    • China South-CentralNative
    • Inner MongoliaNative
    • ManchuriaNative

  • Costa Rica

    • Costa RicaNative

  • Czechia

    • CzechoslovakiaNative

  • Denmark

    • DenmarkNative

  • Ecuador

    • EcuadorIntroduced

  • El Salvador

    • El SalvadorNative

  • Finland

    • FinlandNative

  • Iceland

    • IcelandNative

  • Isle of Man

    • Great BritainNative

  • Japan

    • JapanNative

  • Korea, Democratic People's Republic of

    • KoreaNative

  • Korea, Republic of

    • KoreaNative

  • Liechtenstein

    • AustriaNative

  • Mexico

    • Mexico GulfNative
    • Mexico NortheastNative
    • Mexico NorthwestNative
    • Mexico SouthwestNative

  • Mongolia

    • MongoliaNative

  • Norway

    • NorwayNative

  • Portugal

    • PortugalIntroduced

  • Russian Federation

    • AmurNative
    • BuryatiyaNative
    • Central European RussiaNative
    • IrkutskNative
    • KhabarovskNative
    • North European RussiaNative
    • Northwest European RussiaNative
    • PrimoryeNative
    • SakhalinNative

  • Saint Pierre and Miquelon

    • NewfoundlandNative

  • Slovakia

    • CzechoslovakiaNative

  • Sweden

    • SwedenNative

  • Tajikistan

    • TadzhikistanNative

  • United Kingdom of Great Britain and Northern Ireland

    • Great BritainNative

  • United States of America

    • AlaskaNative
    • CaliforniaNative
    • MinnesotaNative
    • New JerseyNative
    • New YorkNative
    • OregonNative
    • VermontNative
    • WashingtonNative

Climate of the native range

The Köppen climate classes found in the areas this plant is recorded as native to. It does not mean an entire area has that climate.

  • Cfb Temperate, no dry season, warm summer
  • Dfb Cold, no dry season, warm summer
  • Aw Tropical, savannah
  • Dfc Cold, no dry season, cold summer
  • Dwc Cold, dry winter, cold summer
  • ET Polar, tundra
  • Dwb Cold, dry winter, warm summer
  • Cfa Temperate, no dry season, hot summer
  • Dwa Cold, dry winter, hot summer
  • BWh Arid, desert, hot
  • Af Tropical, rainforest
  • BWk Arid, desert, cold
  • Am Tropical, monsoon
  • Dfa Cold, no dry season, hot summer
  • BSk Arid, steppe, cold
  • Cwa Temperate, dry winter, hot summer
  • Dsb Cold, dry summer, warm summer
  • Csb Temperate, dry summer, warm summer
  • BSh Arid, steppe, hot
  • Csa Temperate, dry summer, hot summer
  • Cwb Temperate, dry winter, warm summer
  • Dsc Cold, dry summer, cold summer

The same climate occurs in 363 areas worldwide, 315 of which have no record of this plant. See them on the map

A matching climate does not mean the plant can grow there. Range limits are also set by things other than climate — dispersal history, soils, competition. Source: Beck et al. (2023), CC BY 4.0 (observed period 1991–2020).

Other names

Pigmyweed、Water pygmyweed、Water Pygmyweed

Family
Crassulaceae
Genus
Crassula

Other species in Crassula

Sources

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Åland Islands · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Austria · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Bolivia, Plurinational State of · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Canada · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    China · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Costa Rica · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Czechia · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Denmark · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Ecuador · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Finland · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    United Kingdom of Great Britain and Northern Ireland · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Isle of Man · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Iceland · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Japan · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Korea, Republic of · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Liechtenstein · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Mexico · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Mongolia · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Norway · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Korea, Democratic People's Republic of · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Portugal · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Russian Federation · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    El Salvador · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Saint Pierre and Miquelon · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Slovakia · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Sweden · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    Tajikistan · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

  • World Checklist of Vascular Plants (WCVP), version 2026-06-04

    United States of America · Royal Botanic Gardens, Kew · wcvp_distribution.csv

    Open source

Image information

  • Photograph of Crassula aquatica

    Hörður Kristinsson from Eyjafjarðarsveit, Island · CC BY 2.0 · File page