{
  "$schema": "https://botanai.app/schema/genus-v1.json",
  "schema_version": 1,
  "url": "https://botanai.app/genus/houstonia/",
  "id": {
    "slug": "houstonia"
  },
  "genus": "Houstonia",
  "family": "Rubiaceae",
  "family_url": "https://botanai.app/family/rubiaceae/",
  "accepted_species": 24,
  "documented_species": 16,
  "species": [
    {
      "scientific_name": "Houstonia acerosa",
      "authorship": "(A.Gray) Benth. & Hook.f.",
      "wfo": "wfo-0000215139",
      "slug": "houstonia-acerosa",
      "photographs_found": 105,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-acerosa/"
    },
    {
      "scientific_name": "Houstonia caerulea",
      "authorship": "L.",
      "wfo": "wfo-0000215160",
      "slug": "houstonia-caerulea",
      "photographs_found": 2502,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-caerulea/"
    },
    {
      "scientific_name": "Houstonia canadensis",
      "authorship": "Willd.",
      "wfo": "wfo-0000215162",
      "slug": "houstonia-canadensis",
      "photographs_found": 9,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-canadensis/"
    },
    {
      "scientific_name": "Houstonia correllii",
      "authorship": "(W.H.Lewis) Terrell",
      "wfo": "wfo-0000215168",
      "slug": "houstonia-correllii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia croftiae",
      "authorship": "Britton & Rusby",
      "wfo": "wfo-0000215169",
      "slug": "houstonia-croftiae",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia humifusa",
      "authorship": "(Engelm. ex A.Gray) A.Gray",
      "wfo": "wfo-0000215188",
      "slug": "houstonia-humifusa",
      "photographs_found": 22,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-humifusa/"
    },
    {
      "scientific_name": "Houstonia longifolia",
      "authorship": "Gaertn.",
      "wfo": "wfo-0000215197",
      "slug": "houstonia-longifolia",
      "photographs_found": 435,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-longifolia/"
    },
    {
      "scientific_name": "Houstonia macvaughii",
      "authorship": "(Terrell) Govaerts ex Borhidi",
      "wfo": "wfo-0001332897",
      "slug": "houstonia-macvaughii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia micrantha",
      "authorship": "(Shinners) Terrell",
      "wfo": "wfo-0000215207",
      "slug": "houstonia-micrantha",
      "photographs_found": 105,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-micrantha/"
    },
    {
      "scientific_name": "Houstonia ouachitana",
      "authorship": "(E.B.Sm.) Terrell",
      "wfo": "wfo-0000215222",
      "slug": "houstonia-ouachitana",
      "photographs_found": 4,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-ouachitana/"
    },
    {
      "scientific_name": "Houstonia palmeri",
      "authorship": "A.Gray",
      "wfo": "wfo-0000215223",
      "slug": "houstonia-palmeri",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia parviflora",
      "authorship": "Holz. ex Greenm.",
      "wfo": "wfo-0000215226",
      "slug": "houstonia-parviflora",
      "photographs_found": 4,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-parviflora/"
    },
    {
      "scientific_name": "Houstonia procumbens",
      "authorship": "(Walter ex J.F.Gmel.) Standl.",
      "wfo": "wfo-0000215234",
      "slug": "houstonia-procumbens",
      "photographs_found": 397,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-procumbens/"
    },
    {
      "scientific_name": "Houstonia prostrata",
      "authorship": "Brandegee",
      "wfo": "wfo-0000215235",
      "slug": "houstonia-prostrata",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia purpurea",
      "authorship": "L.",
      "wfo": "wfo-0000215241",
      "slug": "houstonia-purpurea",
      "photographs_found": 713,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-purpurea/"
    },
    {
      "scientific_name": "Houstonia pusilla",
      "authorship": "Schoepf",
      "wfo": "wfo-0000215245",
      "slug": "houstonia-pusilla",
      "photographs_found": 1053,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-pusilla/"
    },
    {
      "scientific_name": "Houstonia rosea",
      "authorship": "(Raf.) Terrell",
      "wfo": "wfo-0000215252",
      "slug": "houstonia-rosea",
      "photographs_found": 22,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-rosea/"
    },
    {
      "scientific_name": "Houstonia rubra",
      "authorship": "Cav.",
      "wfo": "wfo-0000215254",
      "slug": "houstonia-rubra",
      "photographs_found": 37,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-rubra/"
    },
    {
      "scientific_name": "Houstonia serpyllifolia",
      "authorship": "Michx.",
      "wfo": "wfo-0000215262",
      "slug": "houstonia-serpyllifolia",
      "photographs_found": 135,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-serpyllifolia/"
    },
    {
      "scientific_name": "Houstonia sharpii",
      "authorship": "Terrell",
      "wfo": "wfo-0000215265",
      "slug": "houstonia-sharpii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia spellenbergii",
      "authorship": "(G.L.Nesom & Vorobik) Terrell",
      "wfo": "wfo-0000215266",
      "slug": "houstonia-spellenbergii",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia subviscosa",
      "authorship": "(C.Wright ex A.Gray) A.Gray",
      "wfo": "wfo-0000215267",
      "slug": "houstonia-subviscosa",
      "photographs_found": 6,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-subviscosa/"
    },
    {
      "scientific_name": "Houstonia teretifolia",
      "authorship": "Terrell",
      "wfo": "wfo-0000215272",
      "slug": "houstonia-teretifolia",
      "photographs_found": 0,
      "documented": false,
      "url": null
    },
    {
      "scientific_name": "Houstonia wrightii",
      "authorship": "A.Gray",
      "wfo": "wfo-0000215279",
      "slug": "houstonia-wrightii",
      "photographs_found": 69,
      "documented": true,
      "url": "https://botanai.app/plants/houstonia-wrightii/"
    }
  ],
  "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/houstonia/"
  }
}