{"id":"oenothera","license":"CC-BY-4.0","data":{"scientificName":"Oenothera","commonNames":["Evening primrose"],"taxonRank":"genus","acceptedName":"Oenothera","family":"Onagraceae","ids":{"usdaSymbol":"OENOT","gbifKey":3188799,"itisTsn":27367,"wikidataQid":"Q157658","inatTaxonId":48626},"usdaZoneMin":"3a","usdaZoneMax":"7b","zoneSource":"pnw590","states":["ID","OR","WA"],"hardinessAssertions":[{"minimum":"3","maximum":"7","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"perennials:Evening primrose","sourceTaxon":"Oenothera spp.","taxonMatch":"exact","sourcePlacement":"Evening primrose profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"perennial","photo":{"file":"/images/plants/oenothera.jpg","sourceUrl":"https://www.inaturalist.org/photos/8171901","observationUrl":"https://www.inaturalist.org/observations/6463641","license":"cc-by","attribution":"(c) Zihao Wang, some rights reserved (CC BY)","fetchedOn":"2026-08-23T00:00:00.000Z"},"evidence":[{"source":"pnw-590","verdict":"recommend","verdictRaw":"listed fire-resistant","edition":"2023","url":"https://extension.oregonstate.edu/catalog/pub/pnw-590-fire-resistant-plants-home-landscapes","documentDate":"2023-10-01T00:00:00.000Z","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"idaho-firewise-master-db","verdict":"recommend","verdictRaw":"fire-resistance score 8 of 10","score":{"value":8,"scale":"idaho-0-10"},"sourcePlacement":{"value":"plantable at 30' from home","scheme":"idaho-distance"},"url":"https://idahofirewise.org/wp-content/uploads/2017/04/FireXResistanceXofXPlantsXMasterXDatabase.pdf","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"firesmart-bc","verdict":"recommend","verdictRaw":"FireSmart-approved fire-resistant plant","sourcePlacement":{"value":"suitable for HIZ extended zone (30-100 m)","scheme":"firesmart-hiz"},"original":"pnw-590","url":"https://firesmartbc.ca/landscaping-hub/fire-resistant-plants/","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"unr-compilation-good-plant-choices","verdict":"recommend","verdictRaw":"listed by at least two cited sources","claims":"Compilation marks: CSU 6.305, UI Bulletin 67, MT200101AG, OSU FRN 6, USU NR/FF/002.","edition":"SP-05-16 (2005)","url":"https://extension.unr.edu/publication.aspx?PubID=4762","documentDate":"2005-01-01T00:00:00.000Z","accessedOn":"2026-08-24T00:00:00.000Z"},{"source":"usu-firewise-plants-utah","verdict":"recommend","verdictRaw":"listed as a firewise plant for Utah landscapes","claims":"Source says the plant can be firewise when properly used and maintained. Source table name: Oenothera species.","edition":"2005 revision","url":"https://extension.usu.edu/smallfarms/files/FirewisePlantsUtLandscapes.pdf","documentDate":"2005-02-01T00:00:00.000Z","accessedOn":"2026-08-24T00:00:00.000Z"},{"source":"msu-montguide-mt200101ag","verdict":"recommend","verdictRaw":"listed fire-resistant","claims":"Listed among fire-resistant plant species adapted to Montana.","edition":"Current as of 4/22","url":"https://extension-store.montana.edu/montguides/fire-resistant-plants-for-montana-landscapes","documentDate":"2022-04-01T00:00:00.000Z","accessedOn":"2026-08-24T00:00:00.000Z"},{"source":"king-county-puget-sound-2011","verdict":"recommend","verdictRaw":"Fire-resistant Landscape Plants","claims":"Listed in the source's Perennials table as Oenotheria spp. (Evening primrose).","edition":"2011","url":"https://your.kingcounty.gov/dnrp/library/water-and-land/forestry/forestfire/FirewisePlantsPugetSoundBasin-2011.pdf","documentDate":"2011-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"msu-e2948","verdict":"recommend","verdictRaw":"considered wildfire-resistant and are recommended for Michigan’s climate","claims":"Table 1 row: Oenothera spp. (Primrose).","edition":"New, January 2007","url":"https://web.archive.org/web/20070714035839/http://www.firewise.org/usa/files/mi_wildfire_resistant.pdf","documentDate":"2007-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"osu-em-9103","verdict":"recommend","verdictRaw":"fire-resistant plants that thrive in Willamette Valley growing conditions","claims":"The perennials profile lists Oenothera spp. as Evening Primrose. The profile prints USDA Hardiness Zone: Varies by species.","plantPart":"whole-plant","sourcePlacement":{"value":"Evening Primrose profile (PDF page 50)","scheme":"osu-em-9103-profile"},"edition":"EM 9103, February 2015","url":"https://www.canbyfire.org/files/074d2a9e3/Fire-Resistant-Plants_Willamette-Valley.pdf","documentDate":"2015-02-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"osu-plant-profile-galleries","verdict":"recommend","verdictRaw":"Choose the right perennial plants for your fire-resistant landscape","claims":"The Evening primrose profile prints Oenothera species. The gallery points to PNW 590 for complete details.","plantPart":"whole-plant","sourcePlacement":{"value":"Evening primrose — Oenothera spp.","scheme":"osu-2023-perennials-gallery"},"edition":"November 2023 educational gallery","url":"https://extension.oregonstate.edu/gallery/fire-resistant-plant-profiles-perennials","documentDate":"2023-11-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"yavapai-34","verdict":"recommend","verdictRaw":"Fire-Resistant Plants","claims":"Listed as Mexican evening primrose — Oenothera sp.. The bulletin says fire-resistant plants tend to resist ignition when irrigated and maintained, while fire-prone plants may ignite readily and burn intensely.","plantPart":"whole-plant","edition":"v1.2","url":"https://www.extension.arizona.edu/sites/default/files/2025-03/FirewisePlants3-14-2025.pdf","documentDate":"2025-03-14T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"consensus","recommendation":"on-list","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-23T00:00:00.000Z","reviewNotes":"Photo auto-selected (top-voted iNat); human review pending."},"localAssessmentInputs":{"stateDistribution":["ID","OR","WA"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["ID","OR","WA"]},"provenance":"legacy-field"}],"usdaZoneMin":"3a","usdaZoneMax":"7b","hardinessAssertions":[{"minimum":"3","maximum":"7","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"perennials:Evening primrose","sourceTaxon":"Oenothera spp.","taxonMatch":"exact","sourcePlacement":"Evening primrose profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"3","maximum":"7","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"perennials:Evening primrose","sourceTaxon":"Oenothera spp.","taxonMatch":"exact","sourcePlacement":"Evening primrose profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},"assertions":[{"minimum":"3","maximum":"7","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"perennials:Evening primrose","sourceTaxon":"Oenothera spp.","taxonMatch":"exact","sourcePlacement":"Evening primrose profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}]},"invasiveIn":[],"statusAssertions":[],"fireEvidenceClass":"fire-resistant","recommendation":"on-list","fireSourceScopes":[{"source":"idaho-firewise-master-db","sourceName":"Fire Resistance of Plants Master Database","sourceUrl":"https://idahofirewise.org/wp-content/uploads/2017/04/FireXResistanceXofXPlantsXMasterXDatabase.pdf","geography":{"grain":"aggregate-region","stateCodes":["ID"],"regions":["Southern Idaho"]},"completeness":"partial","reviewStatus":"reviewed","scope":"The official database labels itself \"For Southern Idaho\" and describes Idaho residents at the urban-rangeland interface. FireApproved publishes 419 existing plant owners that cite its scored rows. This bounded Southern Idaho scope is regional context, not statewide coverage or a conclusion that the score transfers unchanged to every Idaho site.","sourceVersion":"Idaho-Firewise-Southern-Idaho-Master-2013-11-08","asOf":"2013-11-08T00:00:00.000Z"},{"source":"king-county-puget-sound-2011","sourceName":"Firewise Plants for the Puget Sound Basin","sourceUrl":"https://your.kingcounty.gov/dnrp/library/water-and-land/forestry/forestfire/FirewisePlantsPugetSoundBasin-2011.pdf","geography":{"grain":"aggregate-region","stateCodes":["WA"],"regions":["Puget Sound Basin"]},"completeness":"partial","reviewStatus":"reviewed","scope":"King County's current wildfire page links this list for the Puget Sound Basin. FireApproved publishes 82 exact source owners as basin context, not statewide Washington guidance or a site-specific recommendation.","sourceVersion":"King-County-Puget-Sound-Basin-2011","asOf":"2011-01-01T00:00:00.000Z"},{"source":"msu-e2948","sourceName":"Wildfire-resistant Landscape Plants for Michigan (Extension Bulletin E2948)","sourceUrl":"https://web.archive.org/web/20070714035839/http://www.firewise.org/usa/files/mi_wildfire_resistant.pdf","geography":{"grain":"state","stateCodes":["MI"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Michigan State University Extension Bulletin E2948 is explicitly a list of wildfire-resistant landscape plants for Michigan and includes a Michigan-native field. FireApproved publishes 221 exact GBIF owners from 226 represented source rows and holds 15 complex or non-exact rows. This dated publication scope is not a current site-suitability determination.","sourceVersion":"MSU-Extension-E2948-2007","asOf":"2007-01-01T00:00:00.000Z"},{"source":"msu-montguide-mt200101ag","sourceName":"Fire-Resistant Plants for Montana Landscapes (MontGuide MT200101AG)","sourceUrl":"https://extension-store.montana.edu/montguides/fire-resistant-plants-for-montana-landscapes","geography":{"grain":"state","stateCodes":["MT"]},"completeness":"partial","reviewStatus":"reviewed","scope":"The April 2022 MontGuide explicitly presents fire-resistant species adapted to Montana. FireApproved publishes 92 exact plant records from the source while retaining excluded genus, family, and unresolved rows; the guide itself says not every listed species grows in every part of the state.","sourceVersion":"MT200101AG-current-2022-04","asOf":"2022-04-01T00:00:00.000Z"},{"source":"osu-em-9103","sourceName":"Fire-resistant Landscape Plants for the Willamette Valley (EM 9103)","sourceUrl":"https://www.canbyfire.org/files/074d2a9e3/Fire-Resistant-Plants_Willamette-Valley.pdf","geography":{"grain":"aggregate-region","stateCodes":["OR"],"regions":["Willamette Valley"]},"completeness":"partial","reviewStatus":"reviewed","scope":"OSU Extension says EM 9103 highlights fire-resistant plants that thrive under Willamette Valley growing conditions. FireApproved publishes 172 exact owners only as valley context. The guide shares the PNW 590 lineage and is not a second independent vote or statewide site clearance.","sourceVersion":"OSU-EM-9103-2015-02","asOf":"2015-02-01T00:00:00.000Z"},{"source":"pnw-590","sourceName":"Fire-Resistant Plants for Home Landscapes (PNW 590)","sourceUrl":"https://extension.oregonstate.edu/catalog/pub/pnw-590-fire-resistant-plants-home-landscapes","geography":{"grain":"state","stateCodes":["ID","OR","WA"]},"completeness":"partial","reviewStatus":"reviewed","scope":"The October 2023 joint Pacific Northwest Extension publication explicitly names Oregon, Washington, and Idaho and publishes more than 150 plant profiles. FireApproved has normalized 155 exact plant records from the source; publication scope does not assert that every listed plant suits every site within the three states.","sourceVersion":"PNW-590-October-2023","asOf":"2023-10-01T00:00:00.000Z"},{"source":"unr-compilation-good-plant-choices","sourceName":"A Compilation of Good Plant Choices for Nevada's High Fire Hazard Areas (SP-05-16)","sourceUrl":"https://extension.unr.edu/publication.aspx?PubID=4762","geography":{"grain":"state","stateCodes":["NV"]},"completeness":"partial","reviewStatus":"reviewed","scope":"University of Nevada Cooperative Extension compiled plants suited to Nevada climate zones and reported favorably by at least two upstream firewise lists. FireApproved publishes 126 exact source owners at Nevada publication scope. The source explicitly makes no independent flammability determination, so these rows remain corroborative.","sourceVersion":"UNR-Extension-SP-05-16-2005","asOf":"2005-01-01T00:00:00.000Z"},{"source":"usu-firewise-plants-utah","sourceName":"Firewise Plants for Utah Landscapes (NR/FF/002)","sourceUrl":"https://extension.usu.edu/smallfarms/files/FirewisePlantsUtLandscapes.pdf","geography":{"grain":"state","stateCodes":["UT"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Utah State University Extension states that this fact sheet selects examples for Utah landscapes and that they require proper placement and maintenance. FireApproved publishes 83 exact source owners at Utah publication scope. The table is not a site-specific planting clearance.","sourceVersion":"USU-NR-FF-002-2005-02","asOf":"2005-02-01T00:00:00.000Z"},{"source":"yavapai-34","sourceName":"Fire-Resistant and Fire-Prone Plants Common to Yavapai County (Bulletin 34)","sourceUrl":"https://www.extension.arizona.edu/sites/default/files/2025-03/FirewisePlants3-14-2025.pdf","geography":{"grain":"aggregate-region","stateCodes":["AZ"],"regions":["Yavapai County"]},"completeness":"partial","reviewStatus":"reviewed","scope":"University of Arizona Cooperative Extension authors Bulletin 34 for Yavapai County. FireApproved publishes 198 exact source owners from its resistant and prone tables and keeps the county boundary visible. County publication scope is regional Arizona context, never statewide scope.","sourceVersion":"UA-Yavapai-Bulletin-34-v1.2-2025-03-14","asOf":"2025-03-14T00:00:00.000Z"}],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[],"usdaZoneMin":"3","usdaZoneMax":"7"},"localAssessmentContract":"Compare each dimension separately. State noxious-weed seed designations are material-scoped and never become non-seed plant restrictions, ecological-invasive findings, nursery restrictions, alternatives, product evidence, or fire votes. Introduced/established context is not an invasive warning. Minimum-only hardiness has no inferred maximum; canonical source-temperature conversion is validated and contradictory applicable rows project no primary zone. L48 context applies only to conterminous states and is never exact-state status. Fire-performance conditions are not maintenance advice. FEIS fire-ecology context does not vote in the plant classification. Absence of a status row is not regulatory clearance."}