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    "inat_taxon_id": 58045
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    "scientific": "Xanthium spinosum",
    "authorship": "L.",
    "genus": "Xanthium",
    "epithet": "spinosum",
    "family": "Asteraceae",
    "rank": "species",
    "taxonomic_status": "accepted",
    "accepted_according_to": "World Flora Online Plant List, 2026-06",
    "is_homonym": false,
    "published_in": "Sp. Pl. : 987 (1753)",
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    "common": {
      "preferred": "Spiny clotbur",
      "english": [
        "Spiny clotbur",
        "Spiny cockelbur",
        "Spiny cockleburr",
        "spiny burrweed",
        "spiny clotbur",
        "spiny clotburr",
        "spiny cocklebur",
        "spiny cockleburr"
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        "name": "Acanthoxanthium ambrosioides",
        "authorship": "(Hook. & Arn.) D.Löve"
      },
      {
        "name": "Acanthoxanthium spinosum",
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      },
      {
        "name": "Acanthoxanthium spinosum subsp. catharticum",
        "authorship": "(Kunth) D.Löve"
      },
      {
        "name": "Acanthoxanthium spinosum subsp. spinosum",
        "authorship": null
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      {
        "name": "Xanthium ambrosioides",
        "authorship": "Hook. & Arn."
      },
      {
        "name": "Xanthium armatum",
        "authorship": "Humb. & Bonpl. ex Wallr."
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      {
        "name": "Xanthium canescens",
        "authorship": "Widder"
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      {
        "name": "Xanthium medium",
        "authorship": "Nossotovsky"
      },
      {
        "name": "Xanthium multifidum",
        "authorship": "Larrañaga"
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      {
        "name": "Xanthium spinosum f. laciniatum",
        "authorship": "Scheuerm. & Thell. ex Widder"
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      {
        "name": "Xanthium spinosum f. praecocius",
        "authorship": "Bitter ex Widder"
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      {
        "name": "Xanthium spinosum f. spinosum",
        "authorship": null
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      {
        "name": "Xanthium spinosum var. ambrosioides",
        "authorship": "(Hook. & Arn.) Love & Dans."
      },
      {
        "name": "Xanthium spinosum var. brachyacanthum",
        "authorship": "DC."
      },
      {
        "name": "Xanthium spinosum var. canescens",
        "authorship": "Costa"
      },
      {
        "name": "Xanthium spinosum var. heterocephalum",
        "authorship": "Widder"
      },
      {
        "name": "Xanthium spinosum var. inerme",
        "authorship": "Bel"
      },
      {
        "name": "Xanthium spinosum var. spinosum",
        "authorship": null
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      {
        "name": "Xanthium spinosum var. synacanthum",
        "authorship": "Widder"
      },
      {
        "name": "Xanthium xanthocarpon",
        "authorship": "Wallr."
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        "continent": "SOUTHERN AMERICA",
        "region": "Western South America"
      },
      {
        "code": "BZS",
        "name": "Brazil South",
        "continent": "SOUTHERN AMERICA",
        "region": "Brazil"
      },
      {
        "code": "CLC",
        "name": "Chile Central",
        "continent": "SOUTHERN AMERICA",
        "region": "Southern South America"
      },
      {
        "code": "CLN",
        "name": "Chile North",
        "continent": "SOUTHERN AMERICA",
        "region": "Southern South America"
      },
      {
        "code": "CLM",
        "name": "Colombia",
        "continent": "SOUTHERN AMERICA",
        "region": "Western South America"
      },
      {
        "code": "ECU",
        "name": "Ecuador",
        "continent": "SOUTHERN AMERICA",
        "region": "Western South America"
      },
      {
        "code": "JNF",
        "name": "Juan Fernández Is.",
        "continent": "SOUTHERN AMERICA",
        "region": "Southern South America"
      },
      {
        "code": "PAR",
        "name": "Paraguay",
        "continent": "SOUTHERN AMERICA",
        "region": "Southern South America"
      },
      {
        "code": "PER",
        "name": "Peru",
        "continent": "SOUTHERN AMERICA",
        "region": "Western South America"
      },
      {
        "code": "URU",
        "name": "Uruguay",
        "continent": "SOUTHERN AMERICA",
        "region": "Southern South America"
      }
    ]
  },
  "phenology": {
    "n": 54,
    "n_annotated": 290,
    "sufficient": true,
    "by_month": [
      0,
      4,
      11,
      5,
      0,
      5,
      7,
      9,
      10,
      0,
      2,
      1
    ],
    "annotated_by_month": [
      9,
      17,
      24,
      16,
      15,
      18,
      19,
      44,
      45,
      48,
      22,
      13
    ],
    "share": [
      0,
      0.2353,
      0.4583,
      0.3125,
      0,
      0.2778,
      0.3684,
      0.2045,
      0.2222,
      0,
      0.0909,
      0.0769
    ],
    "ci": [
      [
        0,
        0.2992
      ],
      [
        0.0955,
        0.4726
      ],
      [
        0.2789,
        0.6493
      ],
      [
        0.1416,
        0.556
      ],
      [
        0,
        0.2039
      ],
      [
        0.125,
        0.5087
      ],
      [
        0.1915,
        0.5896
      ],
      [
        0.1115,
        0.345
      ],
      [
        0.1254,
        0.3627
      ],
      [
        0,
        0.0741
      ],
      [
        0.0253,
        0.2782
      ],
      [
        0.0137,
        0.3331
      ]
    ],
    "peak_month": 3,
    "peak_basis": "share",
    "min_month_n": 5,
    "fruiting": {
      "n": 209,
      "by_month": [
        6,
        10,
        21,
        12,
        8,
        6,
        6,
        29,
        37,
        47,
        17,
        10
      ],
      "share": [
        0.6667,
        0.5882,
        0.875,
        0.75,
        0.5333,
        0.3333,
        0.3158,
        0.6591,
        0.8222,
        0.9792,
        0.7727,
        0.7692
      ],
      "ci": [
        [
          0.3542,
          0.8794
        ],
        [
          0.3601,
          0.7839
        ],
        [
          0.69,
          0.9566
        ],
        [
          0.505,
          0.8982
        ],
        [
          0.3012,
          0.7519
        ],
        [
          0.1628,
          0.5625
        ],
        [
          0.1536,
          0.5399
        ],
        [
          0.5114,
          0.7812
        ],
        [
          0.6867,
          0.9071
        ],
        [
          0.891,
          0.9963
        ],
        [
          0.5656,
          0.8988
        ],
        [
          0.4974,
          0.9182
        ]
      ],
      "peak_month": 10
    },
    "doi": "10.15468/dl.cgje2x",
    "source": "GBIF SQL download of iNaturalist Research-grade Observations",
    "quality_grade": "research (guaranteed upstream by iNaturalist at export)",
    "fields": {
      "by_month": "observations found IN FLOWER, by month (Jan..Dec)",
      "annotated_by_month": "observations in which a human recorded the reproductive state at all, by month. This is the denominator, and it includes the records that said \"no flowers or fruits\".",
      "share": "by_month / annotated_by_month. null where too few plants were examined to state a proportion.",
      "ci": "95% Wilson score interval on share.",
      "peak_month": "the month with the highest SHARE, not the highest count."
    }
  },
  "traits": {
    "lifeform": "annual",
    "climate": "subtropical"
  },
  "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."
    }
  ],
  "license": {
    "data": "CC BY 4.0",
    "attribution": "BotanAI, https://botanai.app/plants/xanthium-spinosum/",
    "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)."
  }
}