{
  "$schema": "https://botanai.app/schema/species-v1.json",
  "schema_version": 1,
  "url": "https://botanai.app/plants/carex-nigra/",
  "last_modified": "2025-12-15",
  "id": {
    "slug": "carex-nigra",
    "wfo": "wfo-0000349250",
    "inat_taxon_id": 160036
  },
  "name": {
    "scientific": "Carex nigra",
    "authorship": "(L.) Reichard",
    "genus": "Carex",
    "epithet": "nigra",
    "family": "Cyperaceae",
    "rank": "species",
    "taxonomic_status": "accepted",
    "accepted_according_to": "World Flora Online Plant List, 2026-06",
    "is_homonym": false,
    "published_in": "Fl. Moeno-Francof. 2: 96 (1778)",
    "protologue_url": "https://www.cyperaceae.org/aphia.php?p=taxdetails&id=993791",
    "common": {
      "preferred": "Common Sedge",
      "english": [
        "Common Sedge",
        "smooth black sedge"
      ],
      "source": "wikidata"
    },
    "synonyms": [
      {
        "name": "Carex acuta f. badia",
        "authorship": "Sanio"
      },
      {
        "name": "Carex acuta f. diluta",
        "authorship": "Sanio"
      },
      {
        "name": "Carex acuta f. melanolepis",
        "authorship": "Sanio"
      },
      {
        "name": "Carex acuta f. pseudosparganioides",
        "authorship": "Čelak."
      },
      {
        "name": "Carex acuta f. stygia",
        "authorship": "Sanio"
      },
      {
        "name": "Carex acuta subsp. angustifolia",
        "authorship": "Čelak."
      },
      {
        "name": "Carex acuta subsp. nigra",
        "authorship": "(L.) Ehrh."
      },
      {
        "name": "Carex acuta var. angustifolia",
        "authorship": "Čelak."
      },
      {
        "name": "Carex acuta var. macrocarpa",
        "authorship": "Čelak."
      },
      {
        "name": "Carex acuta var. minor",
        "authorship": "Sw."
      },
      {
        "name": "Carex acuta var. nigra",
        "authorship": "L."
      },
      {
        "name": "Carex acuta var. oxylepis",
        "authorship": "Sanio"
      },
      {
        "name": "Carex acuta var. turfosa",
        "authorship": "Sanio"
      },
      {
        "name": "Carex alboatra",
        "authorship": "Willd. ex Kunth"
      },
      {
        "name": "Carex alpina",
        "authorship": "Honck."
      },
      {
        "name": "Carex angustifolia",
        "authorship": "Sm."
      },
      {
        "name": "Carex aquanigra",
        "authorship": "B.Boivin"
      },
      {
        "name": "Carex cespitosa f. fuliginosa",
        "authorship": "A.Braun"
      },
      {
        "name": "Carex cespitosa subsp. wiluica",
        "authorship": "(Meinsh. ex Maack) Krylov"
      },
      {
        "name": "Carex cespitosa var. alpina",
        "authorship": "Gaudin"
      },
      {
        "name": "Carex cespitosa var. curvata",
        "authorship": "F.Fleisch."
      },
      {
        "name": "Carex cespitosa var. goodenowii",
        "authorship": "(J.Gay) Fiori & Paol."
      },
      {
        "name": "Carex cespitosa var. intricata",
        "authorship": "(Tineo ex Guss.) Fiori & Paol."
      },
      {
        "name": "Carex cespitosa var. polymorpha",
        "authorship": "Laest."
      },
      {
        "name": "Carex cespitosa var. recta",
        "authorship": "F.Fleisch."
      },
      {
        "name": "Carex chlorocarpa",
        "authorship": "Wimm."
      },
      {
        "name": "Carex compacta",
        "authorship": "Krock. ex Hoppe"
      },
      {
        "name": "Carex eboracensis",
        "authorship": "Nelmes"
      },
      {
        "name": "Carex echinata subsp. angustifolia",
        "authorship": "Čelak."
      },
      {
        "name": "Carex fumida",
        "authorship": "Beilschm."
      },
      {
        "name": "Carex fusca",
        "authorship": "All."
      },
      {
        "name": "Carex fusca f. intricata",
        "authorship": "(Tineo ex Guss.) Gamisans"
      },
      {
        "name": "Carex fusca subsp. goodenowii",
        "authorship": "(J.Gay) Maire & Weiller"
      },
      {
        "name": "Carex fusca subsp. intricata",
        "authorship": "(Tineo ex Guss.) Maire & Weiller"
      },
      {
        "name": "Carex fusca var. atlantica",
        "authorship": "Litard. & Maire"
      },
      {
        "name": "Carex fusca var. carpetana",
        "authorship": "C.Vicioso ex Rivas Mart."
      },
      {
        "name": "Carex fusca var. carpetana",
        "authorship": "C.Vicioso"
      },
      {
        "name": "Carex fusca var. chlorostachya",
        "authorship": "(Rchb.) C.Vicioso"
      },
      {
        "name": "Carex fusca var. fuliginosa",
        "authorship": "(A.Braun) C.Vicioso"
      },
      {
        "name": "Carex fusca var. intricata",
        "authorship": "(Tineo ex Guss.) C.Vicioso"
      },
      {
        "name": "Carex fusca var. stolonifera",
        "authorship": "(Asch.) C.Vicioso"
      },
      {
        "name": "Carex gibsonii",
        "authorship": "Bab."
      },
      {
        "name": "Carex goodenoughii",
        "authorship": "Asch. & Graebn."
      },
      {
        "name": "Carex goodenowii",
        "authorship": "J.Gay"
      },
      {
        "name": "Carex goodenowii f. androgyna",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii f. aquatiliformis",
        "authorship": "(Kük.) Kük."
      },
      {
        "name": "Carex goodenowii f. badia",
        "authorship": "(Sanio) Kük."
      },
      {
        "name": "Carex goodenowii f. basigyna",
        "authorship": "(Rchb.) Kük."
      },
      {
        "name": "Carex goodenowii f. chlorostachya",
        "authorship": "(Rchb.) Kük."
      },
      {
        "name": "Carex goodenowii f. densicarpa",
        "authorship": "(Kneuck.) Kük."
      },
      {
        "name": "Carex goodenowii f. fuliginosa",
        "authorship": "(A.Braun) Kük."
      },
      {
        "name": "Carex goodenowii f. grata",
        "authorship": "Sanio"
      },
      {
        "name": "Carex goodenowii f. intricata",
        "authorship": "(Tineo ex Guss.) Foucaud"
      },
      {
        "name": "Carex goodenowii f. leucolepis",
        "authorship": "(Meinsh.) Kük."
      },
      {
        "name": "Carex goodenowii f. microlepis",
        "authorship": "Norman"
      },
      {
        "name": "Carex goodenowii f. microstachys",
        "authorship": "Zapał."
      },
      {
        "name": "Carex goodenowii f. oxylepis",
        "authorship": "(Sanio) Kük."
      },
      {
        "name": "Carex goodenowii f. pleiandra",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii f. polyandra",
        "authorship": "(Schkuhr) Kük."
      },
      {
        "name": "Carex goodenowii f. pumila",
        "authorship": "(Kük.) Kük."
      },
      {
        "name": "Carex goodenowii f. roussioei",
        "authorship": "H.Lév."
      },
      {
        "name": "Carex goodenowii f. silvatica",
        "authorship": "(Russow ex E.Lehm.) Kük."
      },
      {
        "name": "Carex goodenowii f. stenostachya",
        "authorship": "Uechtr. ex Asch. & Graebn."
      },
      {
        "name": "Carex goodenowii f. subfastigiata",
        "authorship": "(Schur) Kük."
      },
      {
        "name": "Carex goodenowii f. subovalis",
        "authorship": "(Kneuck.) Kük."
      },
      {
        "name": "Carex goodenowii f. subramosa",
        "authorship": "(Meinsh.) Kük."
      },
      {
        "name": "Carex goodenowii f. subsetacea",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii f. zonata",
        "authorship": "(F.Nyl.) Kük."
      },
      {
        "name": "Carex goodenowii prol. juncella",
        "authorship": "(Fr.) Rouy"
      },
      {
        "name": "Carex goodenowii subsp. juncea",
        "authorship": "(Fr.) Lindm."
      },
      {
        "name": "Carex goodenowii subsp. stolonifera",
        "authorship": "(Asch.) Asch. & Graebn."
      },
      {
        "name": "Carex goodenowii var. chlorostachya",
        "authorship": "(Rchb.) Asch."
      },
      {
        "name": "Carex goodenowii var. hebridensis",
        "authorship": "(A.Benn.) Wilmott"
      },
      {
        "name": "Carex goodenowii var. hydrophila",
        "authorship": "M.E.Jones"
      },
      {
        "name": "Carex goodenowii var. intricata",
        "authorship": "(Tineo ex Guss.) H.Lindb."
      },
      {
        "name": "Carex goodenowii var. juncea",
        "authorship": "(Fr.) Asch. & Graebn."
      },
      {
        "name": "Carex goodenowii var. juncella",
        "authorship": "(Fr.) Crép."
      },
      {
        "name": "Carex goodenowii var. limnophila",
        "authorship": "M.E.Jones"
      },
      {
        "name": "Carex goodenowii var. lipocarpa",
        "authorship": "M.E.Jones"
      },
      {
        "name": "Carex goodenowii var. melaena",
        "authorship": "(Wimm.) Asch. & Graebn."
      },
      {
        "name": "Carex goodenowii var. miegevilleana",
        "authorship": "Rouy"
      },
      {
        "name": "Carex goodenowii var. nigra",
        "authorship": "Cogn."
      },
      {
        "name": "Carex goodenowii var. olmucensis",
        "authorship": "Podp."
      },
      {
        "name": "Carex goodenowii var. polygama",
        "authorship": "(Peterm.) Peterm."
      },
      {
        "name": "Carex goodenowii var. recta",
        "authorship": "(F.Fleisch.) Kük."
      },
      {
        "name": "Carex goodenowii var. salinoides",
        "authorship": "(Kük.) Kük."
      },
      {
        "name": "Carex goodenowii var. stenocarpa",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii var. stolonifera",
        "authorship": "Asch."
      },
      {
        "name": "Carex goodenowii var. strictiformis",
        "authorship": "(L.H.Bailey) Kük."
      },
      {
        "name": "Carex goodenowii var. subcaespitosa",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii var. subrigida",
        "authorship": "Kük."
      },
      {
        "name": "Carex goodenowii var. tornata",
        "authorship": "(Fr.) Kük."
      },
      {
        "name": "Carex intermedia",
        "authorship": "Miégev."
      },
      {
        "name": "Carex intricata",
        "authorship": "Tineo ex Guss."
      },
      {
        "name": "Carex juncella",
        "authorship": "T.M.Fries"
      },
      {
        "name": "Carex juncella",
        "authorship": "(Fr.) Th.Fr."
      },
      {
        "name": "Carex juncella subsp. wiluica",
        "authorship": "(Meinsh. ex Maack) T.V.Egorova"
      },
      {
        "name": "Carex kolymaensis",
        "authorship": "Kük."
      },
      {
        "name": "Carex malazena",
        "authorship": "Steud."
      },
      {
        "name": "Carex melaena",
        "authorship": "Wimm."
      },
      {
        "name": "Carex melanolepis",
        "authorship": "Phil."
      },
      {
        "name": "Carex navasii",
        "authorship": "Merino"
      },
      {
        "name": "Carex nigra f. abbreviata",
        "authorship": "(Peterm.) Soó"
      },
      {
        "name": "Carex nigra f. badia",
        "authorship": "(Sanio) Soó"
      },
      {
        "name": "Carex nigra f. densicarpa",
        "authorship": "(Kneuck.) Soó"
      },
      {
        "name": "Carex nigra f. leucolepis",
        "authorship": "(Meinsh.) Soó"
      },
      {
        "name": "Carex nigra f. microstachys",
        "authorship": "(Zapał.) Soó"
      },
      {
        "name": "Carex nigra f. pleiandra",
        "authorship": "(Kük.) Soó"
      },
      {
        "name": "Carex nigra f. ramosa",
        "authorship": "(Peterm.) Soó"
      },
      {
        "name": "Carex nigra f. roussioei",
        "authorship": "(H.Lév.) Soó"
      },
      {
        "name": "Carex nigra f. silvatica",
        "authorship": "(Russow ex E.Lehm.) Soó"
      },
      {
        "name": "Carex nigra f. stenostachya",
        "authorship": "(Uechtr. ex Asch. & Graebn.) Soó"
      },
      {
        "name": "Carex nigra f. subfastigiata",
        "authorship": "(Schur) Soó"
      },
      {
        "name": "Carex nigra f. subovalis",
        "authorship": "(Kneuck.) Soó"
      },
      {
        "name": "Carex nigra f. subramosa",
        "authorship": "(Meinsh.) Soó"
      },
      {
        "name": "Carex nigra f. subsetacea",
        "authorship": "(Kük.) Soó"
      },
      {
        "name": "Carex nigra f. tenuis",
        "authorship": "(Peterm.) Soó"
      },
      {
        "name": "Carex nigra subsp. alpina",
        "authorship": "(Gaudin) Lemke"
      },
      {
        "name": "Carex nigra subsp. carpetana",
        "authorship": "C.Vicioso ex Rivas Mart."
      },
      {
        "name": "Carex nigra subsp. iberica",
        "authorship": "Rivas Mart."
      },
      {
        "name": "Carex nigra subsp. juncella",
        "authorship": "Á.Löve & D.Löve"
      },
      {
        "name": "Carex nigra subsp. juncella",
        "authorship": "(Fr.) Lemke"
      },
      {
        "name": "Carex nigra subsp. obesa",
        "authorship": "(All.) H.P.Fuchs ex Janch."
      },
      {
        "name": "Carex nigra subsp. obesa",
        "authorship": "(All.) Janch."
      },
      {
        "name": "Carex nigra subsp. recta",
        "authorship": "(F.Fleisch.) Rothm."
      },
      {
        "name": "Carex nigra subsp. tornata",
        "authorship": "(Fr.) Rothm."
      },
      {
        "name": "Carex nigra subsp. wiluica",
        "authorship": "(Meinsh. ex Maack) Á.Löve & D.Löve"
      },
      {
        "name": "Carex nigra var. alpicola",
        "authorship": "Beck"
      },
      {
        "name": "Carex nigra var. juncea",
        "authorship": "(Fr.) Hyl."
      },
      {
        "name": "Carex nigra var. juncea",
        "authorship": "(Fr.) Hyl."
      },
      {
        "name": "Carex nigra var. nigra",
        "authorship": null
      },
      {
        "name": "Carex nigra var. recta",
        "authorship": "(F.Fleisch.) Hyl."
      },
      {
        "name": "Carex nigra var. stenocarpa",
        "authorship": "(Kük.) Soó"
      },
      {
        "name": "Carex nigra var. strictiformis",
        "authorship": "(L.H.Bailey) Fernald"
      },
      {
        "name": "Carex obesa",
        "authorship": "All."
      },
      {
        "name": "Carex orbicularis var. caucasica",
        "authorship": "Ö.Nilsson"
      },
      {
        "name": "Carex polyandra",
        "authorship": "Schkuhr"
      },
      {
        "name": "Carex rigida subsp. intricata",
        "authorship": "(Tineo ex Guss.) Nyman"
      },
      {
        "name": "Carex rigida var. goodenovii",
        "authorship": "(J.Gay) L.H.Bailey"
      },
      {
        "name": "Carex rigida var. intricata",
        "authorship": "(Tineo ex Guss.) Briq."
      },
      {
        "name": "Carex rigida var. juncea",
        "authorship": "(Fr.) L.H.Bailey"
      },
      {
        "name": "Carex rigida var. strictiformis",
        "authorship": "L.H.Bailey"
      },
      {
        "name": "Carex rufa",
        "authorship": "Lam."
      },
      {
        "name": "Carex spiculosa var. hebridensis",
        "authorship": "A.Benn."
      },
      {
        "name": "Carex stolonifera",
        "authorship": "Hoppe"
      },
      {
        "name": "Carex stolonifera subsp. alpina",
        "authorship": "(Gaudin) O.Schwarz"
      },
      {
        "name": "Carex stolonifera subsp. juncella",
        "authorship": "(Fr.) O.Schwarz"
      },
      {
        "name": "Carex stolonifera subsp. vulgaris",
        "authorship": "O.Schwarz"
      },
      {
        "name": "Carex subcaespitosa",
        "authorship": "(Kük.) Wiinst."
      },
      {
        "name": "Carex transcaucasica",
        "authorship": "T.V.Egorova"
      },
      {
        "name": "Carex tumida",
        "authorship": "Beilschm."
      },
      {
        "name": "Carex vulgaris",
        "authorship": "Fr."
      },
      {
        "name": "Carex vulgaris f. abbreviata",
        "authorship": "Peterm."
      },
      {
        "name": "Carex vulgaris f. androgyna",
        "authorship": "Peterm."
      },
      {
        "name": "Carex vulgaris f. androgyna",
        "authorship": "Russow ex E.Lehm."
      },
      {
        "name": "Carex vulgaris f. angustifolia",
        "authorship": "Kük."
      },
      {
        "name": "Carex vulgaris f. aquatiliformis",
        "authorship": "Kük."
      },
      {
        "name": "Carex vulgaris f. basigyna",
        "authorship": "Rchb."
      },
      {
        "name": "Carex vulgaris f. densicarpa",
        "authorship": "Kneuck."
      },
      {
        "name": "Carex vulgaris f. juncella",
        "authorship": "(Fr.) Kük."
      },
      {
        "name": "Carex vulgaris f. latifolia",
        "authorship": "Kük."
      },
      {
        "name": "Carex vulgaris f. leucolepis",
        "authorship": "Meinsh."
      },
      {
        "name": "Carex vulgaris f. pumila",
        "authorship": "Kük."
      },
      {
        "name": "Carex vulgaris f. ramosa",
        "authorship": "Peterm."
      },
      {
        "name": "Carex vulgaris f. repens",
        "authorship": "Brenner"
      },
      {
        "name": "Carex vulgaris f. silvatica",
        "authorship": "Russow ex E.Lehm."
      },
      {
        "name": "Carex vulgaris f. subovalis",
        "authorship": "Kneuck."
      },
      {
        "name": "Carex vulgaris f. tenuis",
        "authorship": "Peterm."
      },
      {
        "name": "Carex vulgaris subsp. alpina",
        "authorship": "(Gaudin) Arcang."
      },
      {
        "name": "Carex vulgaris subsp. juncea",
        "authorship": "Fr."
      },
      {
        "name": "Carex vulgaris subsp. juncella",
        "authorship": "Fr."
      },
      {
        "name": "Carex vulgaris subsp. zonata",
        "authorship": "F.Nyl."
      },
      {
        "name": "Carex vulgaris var. angustifolia",
        "authorship": "A.Blytt"
      },
      {
        "name": "Carex vulgaris var. anomala",
        "authorship": "Blytt"
      },
      {
        "name": "Carex vulgaris var. atra",
        "authorship": "Peterm."
      },
      {
        "name": "Carex vulgaris var. bructeri",
        "authorship": "G.Mey."
      },
      {
        "name": "Carex vulgaris var. caespitiformis",
        "authorship": "Brenner"
      },
      {
        "name": "Carex vulgaris var. chlorostachya",
        "authorship": "Rchb."
      },
      {
        "name": "Carex vulgaris var. communis",
        "authorship": "Meinsh."
      },
      {
        "name": "Carex vulgaris var. elatior",
        "authorship": "Holm"
      },
      {
        "name": "Carex vulgaris var. fuliginosa",
        "authorship": "(A.Braun) Husn."
      },
      {
        "name": "Carex vulgaris var. humilior",
        "authorship": "Maly"
      },
      {
        "name": "Carex vulgaris var. hydrophila",
        "authorship": "Holm"
      },
      {
        "name": "Carex vulgaris var. intermedia",
        "authorship": "Nyman"
      },
      {
        "name": "Carex vulgaris var. intricata",
        "authorship": "(Tineo ex Guss.) Boott"
      },
      {
        "name": "Carex vulgaris var. juncea",
        "authorship": "(Fr.) Hartm."
      },
      {
        "name": "Carex vulgaris var. juncella",
        "authorship": "(Fr.) Lange"
      },
      {
        "name": "Carex vulgaris var. melaena",
        "authorship": "(Wimm.) Nyman"
      },
      {
        "name": "Carex vulgaris var. polygama",
        "authorship": "Rchb."
      },
      {
        "name": "Carex vulgaris var. rigida",
        "authorship": "Blytt"
      },
      {
        "name": "Carex vulgaris var. sabulosa",
        "authorship": "Meinsh."
      },
      {
        "name": "Carex vulgaris var. salinoides",
        "authorship": "Kük."
      },
      {
        "name": "Carex vulgaris var. stolonifera",
        "authorship": "Hartm."
      },
      {
        "name": "Carex vulgaris var. strictiformis",
        "authorship": "L.H.Bailey"
      },
      {
        "name": "Carex vulgaris var. subramosa",
        "authorship": "Meinsh."
      },
      {
        "name": "Carex vulgaris var. tenuis",
        "authorship": "Hartm. ex Lange"
      },
      {
        "name": "Carex vulgaris var. tenuis",
        "authorship": "Hartm."
      },
      {
        "name": "Carex vulgaris var. tenuis",
        "authorship": "Hartm. ex Lange"
      },
      {
        "name": "Carex vulgaris var. teres",
        "authorship": "Boott"
      },
      {
        "name": "Carex vulgaris var. tornata",
        "authorship": "Fr."
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      {
        "name": "Carex vulgaris var. zonata",
        "authorship": "(F.Nyl.) Nyl. & Saelán"
      },
      {
        "name": "Carex wiluica",
        "authorship": "Meinsh."
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        "name": "Carex wiluica",
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      },
      {
        "name": "Carex wiluica subsp. europaea",
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      {
        "name": "Carex zonata",
        "authorship": "F.Nyl."
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      {
        "name": "Vignantha vulgaris",
        "authorship": "Schur"
      },
      {
        "name": "Vignantha vulgaris var. subfastigiata",
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      {
        "name": "Vignea cerina",
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      {
        "name": "Vignea cespitosa var. polygama",
        "authorship": "Peterm."
      },
      {
        "name": "Vignea chlorocarpa",
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      },
      {
        "name": "Vignea compacta",
        "authorship": "Rchb."
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      {
        "name": "Vignea crassinervis",
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      {
        "name": "Vignea rigida",
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      {
        "name": "Vignea vulgaris",
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      {
        "code": "NFL",
        "name": "Newfoundland",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "NSC",
        "name": "Nova Scotia",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "PEI",
        "name": "Prince Edward I.",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "QUE",
        "name": "Québec",
        "continent": "NORTHERN AMERICA",
        "region": "Eastern Canada"
      },
      {
        "code": "VER",
        "name": "Vermont",
        "continent": "NORTHERN AMERICA",
        "region": "Northeastern U.S.A."
      }
    ]
  },
  "phenology": {
    "n": 58,
    "n_annotated": 98,
    "sufficient": true,
    "by_month": [
      0,
      0,
      0,
      7,
      24,
      19,
      5,
      3,
      0,
      0,
      0,
      0
    ],
    "annotated_by_month": [
      0,
      0,
      0,
      7,
      28,
      30,
      21,
      8,
      3,
      1,
      0,
      0
    ],
    "share": [
      null,
      null,
      null,
      1,
      0.8571,
      0.6333,
      0.2381,
      0.375,
      null,
      null,
      null,
      null
    ],
    "ci": [
      null,
      null,
      null,
      [
        0.6457,
        1
      ],
      [
        0.6851,
        0.943
      ],
      [
        0.4551,
        0.7813
      ],
      [
        0.1063,
        0.4509
      ],
      [
        0.1368,
        0.6943
      ],
      null,
      null,
      null,
      null
    ],
    "peak_month": 4,
    "peak_basis": "share",
    "min_month_n": 5,
    "fruiting": {
      "n": 44,
      "by_month": [
        0,
        0,
        0,
        0,
        6,
        13,
        16,
        5,
        3,
        1,
        0,
        0
      ],
      "share": [
        null,
        null,
        null,
        0,
        0.2143,
        0.4333,
        0.7619,
        0.625,
        null,
        null,
        null,
        null
      ],
      "ci": [
        null,
        null,
        null,
        [
          0,
          0.3543
        ],
        [
          0.1021,
          0.3954
        ],
        [
          0.2738,
          0.608
        ],
        [
          0.5491,
          0.8937
        ],
        [
          0.3057,
          0.8632
        ],
        null,
        null,
        null,
        null
      ],
      "peak_month": 7
    },
    "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": "perennial or rhizomatous geophyte",
    "climate": "temperate"
  },
  "climate_envelope": {
    "mean_annual_temp_c": {
      "p5": 0.4,
      "median": 5.3,
      "p95": 9.7
    },
    "temp_seasonality": {
      "p5": 422.7,
      "median": 793.7,
      "p95": 1045.6
    },
    "max_temp_warmest_month_c": {
      "p5": 14.7,
      "median": 21.5,
      "p95": 24
    },
    "min_temp_coldest_month_c": {
      "p5": -15.2,
      "median": -9.5,
      "p95": 0.6
    },
    "annual_precip_mm": {
      "p5": 590,
      "median": 741.7,
      "p95": 1835.2
    },
    "precip_seasonality": {
      "p5": 12.5,
      "median": 28.7,
      "p95": 39.7
    },
    "precip_driest_quarter_mm": {
      "p5": 92.4,
      "median": 119.9,
      "p95": 345.3
    },
    "n": 2000,
    "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": "10.15468/dl.cgje2x",
    "method": "Climate sampled at every georeferenced research-grade observation of the species. Reported as the 5th to 95th percentile across 2000 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."
    }
  ],
  "license": {
    "data": "CC BY 4.0",
    "attribution": "BotanAI, https://botanai.app/plants/carex-nigra/",
    "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)."
  }
}