{
  "$schema": "https://botanai.app/schema/genus-v1.json",
  "schema_version": 1,
  "url": "https://botanai.app/genus/corylus/",
  "id": {
    "slug": "corylus"
  },
  "genus": "Corylus",
  "family": "Betulaceae",
  "family_url": "https://botanai.app/family/betulaceae/",
  "accepted_species": 17,
  "documented_species": 6,
  "species": [
    {
      "scientific_name": "Corylus americana",
      "authorship": "Walter",
      "wfo": "wfo-0000925248",
      "slug": "corylus-americana",
      "photographs_found": 881,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-americana/"
    },
    {
      "scientific_name": "Corylus avellana",
      "authorship": "L.",
      "wfo": "wfo-0000925259",
      "slug": "corylus-avellana",
      "photographs_found": 4135,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-avellana/"
    },
    {
      "scientific_name": "Corylus chinensis",
      "authorship": "Franch.",
      "wfo": "wfo-0000925287",
      "slug": "corylus-chinensis",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus colchica",
      "authorship": "Albov",
      "wfo": "wfo-0000925289",
      "slug": "corylus-colchica",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus colurna",
      "authorship": "L.",
      "wfo": "wfo-0000925290",
      "slug": "corylus-colurna",
      "photographs_found": 35,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-colurna/"
    },
    {
      "scientific_name": "Corylus cornuta",
      "authorship": "Marshall",
      "wfo": "wfo-0000925296",
      "slug": "corylus-cornuta",
      "photographs_found": 1609,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-cornuta/"
    },
    {
      "scientific_name": "Corylus fargesii",
      "authorship": "(Franch.) C.K.Schneid.",
      "wfo": "wfo-0000925309",
      "slug": "corylus-fargesii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus ferox",
      "authorship": "Wall.",
      "wfo": "wfo-0000925310",
      "slug": "corylus-ferox",
      "photographs_found": 2,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus heterophylla",
      "authorship": "Fisch. ex Trautv.",
      "wfo": "wfo-0000925321",
      "slug": "corylus-heterophylla",
      "photographs_found": 24,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-heterophylla/"
    },
    {
      "scientific_name": "Corylus jacquemontii",
      "authorship": "Decne.",
      "wfo": "wfo-0000925335",
      "slug": "corylus-jacquemontii",
      "photographs_found": 1,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus maxima",
      "authorship": "Mill.",
      "wfo": "wfo-0000925346",
      "slug": "corylus-maxima",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus potaninii",
      "authorship": "Bobrov",
      "wfo": "wfo-0000925355",
      "slug": "corylus-potaninii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus sieboldiana",
      "authorship": "Blume",
      "wfo": "wfo-0000925372",
      "slug": "corylus-sieboldiana",
      "photographs_found": 7,
      "documented": true,
      "url": "https://botanai.app/plants/corylus-sieboldiana/"
    },
    {
      "scientific_name": "Corylus wangii",
      "authorship": "Hu",
      "wfo": "wfo-0000925390",
      "slug": "corylus-wangii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus wulingensis",
      "authorship": "Q.X.Liu & C.M.Zhang",
      "wfo": "wfo-0000925391",
      "slug": "corylus-wulingensis",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus yunnanensis",
      "authorship": "(Franch.) A.Camus",
      "wfo": "wfo-0000925393",
      "slug": "corylus-yunnanensis",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Corylus × colurnoides",
      "authorship": "C.K.Schneid.",
      "wfo": "wfo-0000925295",
      "slug": "corylus-colurnoides",
      "photographs_found": 0,
      "documented": false,
      "url": null
    }
  ],
  "evidence_gate": {
    "rule": "at least 3 photographs licensed for commercial use",
    "rationale": "This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species below the gate is listed here rather than given a page of its own."
  },
  "sources": [
    {
      "name": "World Flora Online Plant List",
      "note": "accepted names, authorities, classification",
      "license": "CC0",
      "url": "https://www.worldfloraonline.org/",
      "retrieved": "2026-07-12"
    }
  ],
  "license": {
    "data": "CC BY 4.0",
    "attribution": "BotanAI, https://botanai.app/genus/corylus/"
  }
}