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  "last_modified": "2025-12-15",
  "id": {
    "slug": "equisetum-palustre",
    "wfo": "wfo-0001108921",
    "inat_taxon_id": 76846
  },
  "name": {
    "scientific": "Equisetum palustre",
    "authorship": "L.",
    "genus": "Equisetum",
    "epithet": "palustre",
    "family": "Equisetaceae",
    "rank": "species",
    "taxonomic_status": "accepted",
    "accepted_according_to": "World Flora Online Plant List, 2026-06",
    "is_homonym": false,
    "published_in": "Sp. Pl. 2: 1061 (1753)",
    "protologue_url": "https://pteridogroup.github.io/",
    "common": {
      "preferred": "Marsh Horsetail",
      "english": [
        "Marsh Horsetail",
        "marsh horsetail"
      ],
      "source": "wikidata"
    },
    "synonyms": [
      {
        "name": "Equisetum aquatile",
        "authorship": "Scheller"
      },
      {
        "name": "Equisetum arenarium",
        "authorship": "Opiz"
      },
      {
        "name": "Equisetum hybridum",
        "authorship": "Huter"
      },
      {
        "name": "Equisetum nodosum",
        "authorship": "Hoppe"
      },
      {
        "name": "Equisetum palustre f. arcuatum",
        "authorship": "(Milde) Asch."
      },
      {
        "name": "Equisetum palustre f. fluitans",
        "authorship": "Vict."
      },
      {
        "name": "Equisetum palustre f. luxurians",
        "authorship": "Vict."
      },
      {
        "name": "Equisetum palustre f. microstachyum",
        "authorship": "(Schur) Kaulf."
      },
      {
        "name": "Equisetum palustre f. nigridens",
        "authorship": "(H.St.John) Vict."
      },
      {
        "name": "Equisetum palustre f. nudum",
        "authorship": "Asch."
      },
      {
        "name": "Equisetum palustre f. nudum",
        "authorship": "(Duby) E.Baumann"
      },
      {
        "name": "Equisetum palustre f. palustre",
        "authorship": null
      },
      {
        "name": "Equisetum palustre f. prostratum",
        "authorship": "(Hoppe) Asch."
      },
      {
        "name": "Equisetum palustre f. ramosissimum",
        "authorship": "(M.Peck) M.Broun"
      },
      {
        "name": "Equisetum palustre f. simplex",
        "authorship": "(Rupr.) Milde"
      },
      {
        "name": "Equisetum palustre f. tenue",
        "authorship": "(Döll) M.Broun"
      },
      {
        "name": "Equisetum palustre f. tenue",
        "authorship": "(Döll) E.Baumann"
      },
      {
        "name": "Equisetum palustre f. verticillatum",
        "authorship": "Milde"
      },
      {
        "name": "Equisetum palustre f. wachteri",
        "authorship": "Ooststr."
      },
      {
        "name": "Equisetum palustre subf. compositum",
        "authorship": "(Kaulf.) Münderl."
      },
      {
        "name": "Equisetum palustre subf. giganteum",
        "authorship": "Münderl."
      },
      {
        "name": "Equisetum palustre subf. pauciramosum",
        "authorship": "(Bolle) Murr"
      },
      {
        "name": "Equisetum palustre subvar. apiculatum",
        "authorship": "Coss. & Germ."
      },
      {
        "name": "Equisetum palustre var. alpinum",
        "authorship": "Hook.f."
      },
      {
        "name": "Equisetum palustre var. americanum",
        "authorship": "Vict."
      },
      {
        "name": "Equisetum palustre var. aphyllum",
        "authorship": "Lej."
      },
      {
        "name": "Equisetum palustre var. apiculatum",
        "authorship": "(Coss. & Germ.) Rouy"
      },
      {
        "name": "Equisetum palustre var. arcuatum",
        "authorship": "Milde"
      },
      {
        "name": "Equisetum palustre var. collinum-tenerrimum",
        "authorship": "Schur"
      },
      {
        "name": "Equisetum palustre var. japonicum",
        "authorship": "Nakai"
      },
      {
        "name": "Equisetum palustre var. leptostachyum",
        "authorship": "Hampe"
      },
      {
        "name": "Equisetum palustre var. leptostachyum",
        "authorship": "Wallr."
      },
      {
        "name": "Equisetum palustre var. membranaceum",
        "authorship": "Lej."
      },
      {
        "name": "Equisetum palustre var. microstachyum",
        "authorship": "Schur"
      },
      {
        "name": "Equisetum palustre var. monostachyon",
        "authorship": "Borckh."
      },
      {
        "name": "Equisetum palustre var. nanum",
        "authorship": "Milde"
      },
      {
        "name": "Equisetum palustre var. nigridens",
        "authorship": "H.St.John"
      },
      {
        "name": "Equisetum palustre var. nudum",
        "authorship": "Opiz"
      },
      {
        "name": "Equisetum palustre var. nudum",
        "authorship": "Duby"
      },
      {
        "name": "Equisetum palustre var. paludosum",
        "authorship": "Schur"
      },
      {
        "name": "Equisetum palustre var. polystachion",
        "authorship": "Gray"
      },
      {
        "name": "Equisetum palustre var. polystachyum",
        "authorship": "Weigel"
      },
      {
        "name": "Equisetum palustre var. polystachyum",
        "authorship": "A.Braun ex Engelm."
      },
      {
        "name": "Equisetum palustre var. prostratum",
        "authorship": "Brause"
      },
      {
        "name": "Equisetum palustre var. prostratum",
        "authorship": "Hausm."
      },
      {
        "name": "Equisetum palustre var. ramosissimum",
        "authorship": "M.Peck"
      },
      {
        "name": "Equisetum palustre var. ramosum",
        "authorship": "Opiz"
      },
      {
        "name": "Equisetum palustre var. ramulosum",
        "authorship": "Milde"
      },
      {
        "name": "Equisetum palustre var. simplex",
        "authorship": "Rupr."
      },
      {
        "name": "Equisetum palustre var. simplicissimum",
        "authorship": "A.Braun & Engelm."
      },
      {
        "name": "Equisetum palustre var. simplicissimum",
        "authorship": "Schur"
      },
      {
        "name": "Equisetum palustre var. szechuanense",
        "authorship": "C.N.Page"
      },
      {
        "name": "Equisetum palustre var. tenue",
        "authorship": "Döll"
      },
      {
        "name": "Equisetum palustre var. tenuissimum",
        "authorship": "Gray"
      },
      {
        "name": "Equisetum pratense var. prostratum",
        "authorship": "(Hoppe) Rchb."
      },
      {
        "name": "Equisetum tuberosum",
        "authorship": "Hectot ex DC."
      },
      {
        "name": "Equisetum veronense",
        "authorship": "Pollini"
      },
      {
        "name": "Presla palustris",
        "authorship": "(L.) Dulac"
      }
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    "wikipedia": "https://en.wikipedia.org/wiki/Equisetum_palustre"
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      },
      {
        "code": "CHM",
        "name": "Manchuria",
        "continent": "ASIA-TEMPERATE",
        "region": "China"
      },
      {
        "code": "MON",
        "name": "Mongolia",
        "continent": "ASIA-TEMPERATE",
        "region": "Mongolia"
      },
      {
        "code": "NCS",
        "name": "North Caucasus",
        "continent": "ASIA-TEMPERATE",
        "region": "Caucasus"
      },
      {
        "code": "PRM",
        "name": "Primorye",
        "continent": "ASIA-TEMPERATE",
        "region": "Russian Far East"
      },
      {
        "code": "CHQ",
        "name": "Qinghai",
        "continent": "ASIA-TEMPERATE",
        "region": "China"
      },
      {
        "code": "SAK",
        "name": "Sakhalin",
        "continent": "ASIA-TEMPERATE",
        "region": "Russian Far East"
      },
      {
        "code": "CHT",
        "name": "Tibet",
        "continent": "ASIA-TEMPERATE",
        "region": "China"
      },
      {
        "code": "TCS",
        "name": "Transcaucasus",
        "continent": "ASIA-TEMPERATE",
        "region": "Caucasus"
      },
      {
        "code": "TVA",
        "name": "Tuva",
        "continent": "ASIA-TEMPERATE",
        "region": "Siberia"
      },
      {
        "code": "TUR",
        "name": "Türkiye",
        "continent": "ASIA-TEMPERATE",
        "region": "Western Asia"
      },
      {
        "code": "WSB",
        "name": "West Siberia",
        "continent": "ASIA-TEMPERATE",
        "region": "Siberia"
      },
      {
        "code": "CHX",
        "name": "Xinjiang",
        "continent": "ASIA-TEMPERATE",
        "region": "China"
      },
      {
        "code": "YAK",
        "name": "Yakutiya",
        "continent": "ASIA-TEMPERATE",
        "region": "Siberia"
      },
      {
        "code": "PAK",
        "name": "Pakistan",
        "continent": "ASIA-TROPICAL",
        "region": "Indian Subcontinent"
      },
      {
        "code": "WHM",
        "name": "West Himalaya",
        "continent": "ASIA-TROPICAL",
        "region": "Indian Subcontinent"
      },
      {
        "code": "ALB",
        "name": "Albania",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "AUT",
        "name": "Austria",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "BLT",
        "name": "Baltic States",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "BLR",
        "name": "Belarus",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "BGM",
        "name": "Belgium",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "BUL",
        "name": "Bulgaria",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "RUC",
        "name": "Central European Russia",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "COR",
        "name": "Corse",
        "continent": "EUROPE",
        "region": "Southwestern Europe"
      },
      {
        "code": "CZE",
        "name": "Czechia-Slovakia",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "DEN",
        "name": "Denmark",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "RUE",
        "name": "East European Russia",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "FIN",
        "name": "Finland",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "FRA",
        "name": "France",
        "continent": "EUROPE",
        "region": "Southwestern Europe"
      },
      {
        "code": "FOR",
        "name": "Føroyar",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "GER",
        "name": "Germany",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "GRB",
        "name": "Great Britain",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "GRC",
        "name": "Greece",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "HUN",
        "name": "Hungary",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "ICE",
        "name": "Iceland",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "IRE",
        "name": "Ireland",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "ITA",
        "name": "Italy",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "KRI",
        "name": "Kriti",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "KRY",
        "name": "Krym",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "YUG",
        "name": "NW. Balkan Pen.",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "NET",
        "name": "Netherlands",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "RUN",
        "name": "North European Russia",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "RUW",
        "name": "Northwest European Russia",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "NOR",
        "name": "Norway",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "POL",
        "name": "Poland",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "POR",
        "name": "Portugal",
        "continent": "EUROPE",
        "region": "Southwestern Europe"
      },
      {
        "code": "ROM",
        "name": "Romania",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "SAR",
        "name": "Sardegna",
        "continent": "EUROPE",
        "region": "Southwestern Europe"
      },
      {
        "code": "SIC",
        "name": "Sicilia",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "SPA",
        "name": "Spain",
        "continent": "EUROPE",
        "region": "Southwestern Europe"
      },
      {
        "code": "SWE",
        "name": "Sweden",
        "continent": "EUROPE",
        "region": "Northern Europe"
      },
      {
        "code": "SWI",
        "name": "Switzerland",
        "continent": "EUROPE",
        "region": "Middle Europe"
      },
      {
        "code": "TUE",
        "name": "Türkiye-in-Europe",
        "continent": "EUROPE",
        "region": "Southeastern Europe"
      },
      {
        "code": "UKR",
        "name": "Ukraine",
        "continent": "EUROPE",
        "region": "Eastern Europe"
      },
      {
        "code": "ASK",
        "name": "Alaska",
        "continent": "NORTHERN AMERICA",
        "region": "Subarctic America"
      },
      {
        "code": "ABT",
        "name": "Alberta",
        "continent": "NORTHERN AMERICA",
        "region": "Western Canada"
      },
      {
        "code": "BRC",
        "name": "British Columbia",
        "continent": "NORTHERN AMERICA",
        "region": "Western Canada"
      },
      {
        "code": "CAL",
        "name": "California",
        "continent": "NORTHERN AMERICA",
        "region": "Southwestern U.S.A."
      },
      {
        "code": "CNT",
        "name": "Connecticut",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "IDA",
        "name": "Idaho",
        "continent": "NORTHERN AMERICA",
        "region": "Northwestern U.S.A."
      },
      {
        "code": "ILL",
        "name": "Illinois",
        "continent": "NORTHERN AMERICA",
        "region": "North-Central U.S.A."
      },
      {
        "code": "LAB",
        "name": "Labrador",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "MAI",
        "name": "Maine",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "MAN",
        "name": "Manitoba",
        "continent": "NORTHERN AMERICA",
        "region": "Western Canada"
      },
      {
        "code": "MAS",
        "name": "Massachusetts",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "MIC",
        "name": "Michigan",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "MIN",
        "name": "Minnesota",
        "continent": "NORTHERN AMERICA",
        "region": "North-Central U.S.A."
      },
      {
        "code": "MNT",
        "name": "Montana",
        "continent": "NORTHERN AMERICA",
        "region": "Northwestern U.S.A."
      },
      {
        "code": "NBR",
        "name": "New Brunswick",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "NWH",
        "name": "New Hampshire",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "NWY",
        "name": "New York",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "NFL",
        "name": "Newfoundland",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "NDA",
        "name": "North Dakota",
        "continent": "NORTHERN AMERICA",
        "region": "North-Central U.S.A."
      },
      {
        "code": "NWT",
        "name": "Northwest Territories",
        "continent": "NORTHERN AMERICA",
        "region": "Subarctic America"
      },
      {
        "code": "NSC",
        "name": "Nova Scotia",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "ONT",
        "name": "Ontario",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "ORE",
        "name": "Oregon",
        "continent": "NORTHERN AMERICA",
        "region": "Northwestern U.S.A."
      },
      {
        "code": "QUE",
        "name": "Québec",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "SAS",
        "name": "Saskatchewan",
        "continent": "NORTHERN AMERICA",
        "region": "Western Canada"
      },
      {
        "code": "SDA",
        "name": "South Dakota",
        "continent": "NORTHERN AMERICA",
        "region": "North-Central U.S.A."
      },
      {
        "code": "VER",
        "name": "Vermont",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      },
      {
        "code": "WAS",
        "name": "Washington",
        "continent": "NORTHERN AMERICA",
        "region": "Northwestern U.S.A."
      },
      {
        "code": "WIS",
        "name": "Wisconsin",
        "continent": "NORTHERN AMERICA",
        "region": "North-Central U.S.A."
      },
      {
        "code": "YUK",
        "name": "Yukon",
        "continent": "NORTHERN AMERICA",
        "region": "Subarctic America"
      }
    ]
  },
  "phenology": null,
  "traits": {
    "lifeform": "rhizomatous geophyte or helophyte",
    "climate": "temperate"
  },
  "climate_envelope": {
    "mean_annual_temp_c": {
      "p5": -0.6,
      "median": 8,
      "p95": 11.1
    },
    "temp_seasonality": {
      "p5": 394.8,
      "median": 723,
      "p95": 1358.7
    },
    "max_temp_warmest_month_c": {
      "p5": 15.6,
      "median": 22,
      "p95": 25.8
    },
    "min_temp_coldest_month_c": {
      "p5": -25.7,
      "median": -5.5,
      "p95": 2.9
    },
    "annual_precip_mm": {
      "p5": 457.8,
      "median": 779.4,
      "p95": 1754.2
    },
    "precip_seasonality": {
      "p5": 11.9,
      "median": 28.4,
      "p95": 72.1
    },
    "precip_driest_quarter_mm": {
      "p5": 46.9,
      "median": 133.2,
      "p95": 313.7
    },
    "n": 1938,
    "units": {
      "mean_annual_temp_c": "degrees Celsius",
      "min_temp_coldest_month_c": "degrees Celsius (mean daily MINIMUM of the coldest month)",
      "max_temp_warmest_month_c": "degrees Celsius (mean daily MAXIMUM of the warmest month)",
      "annual_precip_mm": "millimetres per year",
      "precip_driest_quarter_mm": "millimetres in the driest quarter"
    },
    "source": "CHELSA V2.1 climatologies 1981-2010, 30 arcsec",
    "citation": "Karger, D.N. et al. (2017) Climatologies at high resolution for the earth's land surface areas. Scientific Data 4, 170122.",
    "occurrences": "iNaturalist Research-grade Observations",
    "occurrences_doi": null,
    "method": "Climate sampled at every georeferenced research-grade observation of the species. Reported as the 5th to 95th percentile across 1938 of them. Species with fewer than 30 georeferenced observations get no envelope.",
    "is_hardiness_zone": false,
    "hardiness_zone_note": "min_temp_coldest_month_c is NOT a USDA hardiness zone. A USDA zone is the average annual EXTREME minimum temperature; this is the mean daily minimum of the coldest month, which is typically about 16 C warmer. Do not present one as the other."
  },
  "identification": {
    "on_device_model": {
      "model": "Google AIY plants V1 (TFLite, 2,102 classes)",
      "identifies_this_species": false
    },
    "in_accuracy_benchmark": false,
    "benchmark_url": "https://botanai.app/accuracy/",
    "confused_with": []
  },
  "sources": [
    {
      "name": "World Flora Online Plant List",
      "note": "accepted name, authority, classification",
      "license": "CC0",
      "url": "https://www.worldfloraonline.org/",
      "retrieved": "2026-07-12"
    },
    {
      "name": "iNaturalist",
      "note": "photographs and flowering annotations, CC0 / CC BY / CC BY-SA only",
      "license": "per photograph",
      "url": "https://www.inaturalist.org/",
      "retrieved": "2026-06-27"
    },
    {
      "name": "Wikidata",
      "note": "common name (P1843), joined on the World Flora Online identifier (P7715)",
      "license": "CC0",
      "url": "https://www.wikidata.org/",
      "retrieved": "2026-07-13"
    },
    {
      "name": "Kew, World Checklist of Vascular Plants (WCVP v16)",
      "note": "native distribution by TDWG level-3 botanical country, and life form",
      "license": "CC BY 3.0",
      "url": "https://doi.org/10.15468/6h8ucr",
      "retrieved": "2026-06-04"
    }
  ],
  "gaps": [
    {
      "field": "care",
      "status": "not_published",
      "reason": "Not published anywhere on this site. Every care claim we could make cheaply would be an unsourced enum, which is what the previous version of this site did and why it was deleted."
    },
    {
      "field": "toxicity",
      "status": "not_published",
      "reason": "Not published. The widely copied list is a copyrighted compilation restricted to noncommercial use, and we will not scrape it. A sourced toxicity dataset is being built from primary literature and is not ready."
    },
    {
      "field": "botanical_review",
      "status": "not_sourced",
      "reason": "No page on this site has been reviewed by a named botanist. The determination label says so, on every page."
    },
    {
      "field": "hardiness_zone",
      "status": "not_published",
      "reason": "Not published for any species. A USDA hardiness zone is the average annual EXTREME minimum temperature, and we hold the mean daily minimum of the coldest month, which is a different quantity and typically about 16 C warmer. Presenting one as the other would place a plant several zones too warm, so we do not publish a zone at all."
    },
    {
      "field": "phenology",
      "status": "not_sourced",
      "reason": "No dated flowering annotations found for this taxon."
    }
  ],
  "license": {
    "data": "CC BY 4.0",
    "attribution": "BotanAI, https://botanai.app/plants/equisetum-palustre/",
    "note": "This document is licensed CC BY 4.0. The PHOTOGRAPHS it links are licensed individually and separately: each carries its own license and license_url, and those terms govern. Underlying taxonomy is CC0 (World Flora Online); native range is CC BY 3.0 (Kew)."
  }
}