{"id":"juglans-regia","license":"CC-BY-4.0","data":{"scientificName":"Juglans regia","commonNames":["English walnut"],"taxonRank":"species","acceptedName":"Juglans regia","family":"Juglandaceae","ids":{"usdaSymbol":"JURE80","gbifKey":3054368,"itisTsn":503244,"wikidataQid":"Q46871","inatTaxonId":63935},"usdaZoneMin":"6a","zoneSource":"fps-2016","states":["CA","DC","DE","ID","MD","MI","NJ","NY","OH","PA","WA","WV"],"invasiveIn":[{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae8695","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Juglans regia","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021cgg), https://plants.usda.gov/home/plantProfile?symbol=JURE80"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"}}],"hardinessAssertions":[{"minimum":"6","interpretation":"ambiguous-single-value","precision":"whole-zone","zoneMapping":"source-stated","applicability":"uncertain","applicabilityNotes":"The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.","source":"fps-eastern-us","sourceRecordId":"juglans-regia","sourceTaxon":"Juglans regia","taxonMatch":"exact","sourcePlacement":"Cold Hardiness Zone field in the recovered selector record","sourceVersion":"2016-wayback","asOf":"2026-08-26T00:00:00.000Z"},{"minimum":"6a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-8,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"JURE80","sourceTaxon":"Juglans regia","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70687, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"tree","matureHeightFt":35,"sun":"full","waterNeed":"high","photo":{"file":"/images/plants/juglans-regia.jpg","sourceUrl":"https://www.inaturalist.org/photos/561405581","observationUrl":"https://www.inaturalist.org/observations/311020984","license":"cc-by","attribution":"(c) Gianni Del Bufalo bygdb, some rights reserved (CC BY)","fetchedOn":"2026-08-23T00:00:00.000Z"},"evidence":[{"source":"fps-eastern-us","verdict":"recommend","verdictRaw":"Firewise (1)","claims":"Source of valuable commercial nut.","sourcePlacement":{"value":"LZ3","scheme":"fps-landscape-zone"},"edition":"2016-wayback","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"fenz-low-flammability","verdict":"mixed","verdictRaw":"Moderate flammability","claims":"Moderate flammability classification.","plantPart":"shoot","edition":"2026","url":"https://www.checkitsalright.nz/reduce-your-risk/low-flammability-plants","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"flamits","verdict":"not-rated","verdictRaw":"calorific value (kcal/kg): 4781.69","score":{"value":4781.69,"scale":"FLAMITS — calorific value (kcal/kg)"},"claims":"FLAMITS record 3920; Combustibility measurement; plant part twigs; fuel live; predrying yes; device calorimeter; site Gillon1997-1; sampling june to september. Primary study Gillon1997: Gillon, D., Hernando, C., Valette, J.-C., & Joffre, R. (1997). Fast estimation of the calorific values of forest fuels by near infrared-reflectance spectroscopy. Canadian Journal of Forest Research, 27, 760-765.","plantPart":"shoot","original":"Gillon1997","edition":"Dryad version 9","url":"https://doi.org/10.5061/dryad.h18931zr3","documentDate":"2023-12-22T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"limited-evidence","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":["CA","DC","DE","ID","MD","MI","NJ","NY","OH","PA","WA","WV"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["CA","DC","DE","ID","MD","MI","NJ","NY","OH","PA","WA","WV"]},"provenance":"legacy-field"}],"usdaZoneMin":"6a","usdaZoneMax":null,"hardinessAssertions":[{"minimum":"6","interpretation":"ambiguous-single-value","precision":"whole-zone","zoneMapping":"source-stated","applicability":"uncertain","applicabilityNotes":"The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.","source":"fps-eastern-us","sourceRecordId":"juglans-regia","sourceTaxon":"Juglans regia","taxonMatch":"exact","sourcePlacement":"Cold Hardiness Zone field in the recovered selector record","sourceVersion":"2016-wayback","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},{"minimum":"6a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-8,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"JURE80","sourceTaxon":"Juglans regia","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70687, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"6a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-8,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"JURE80","sourceTaxon":"Juglans regia","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70687, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},"assertions":[{"minimum":"6","interpretation":"ambiguous-single-value","precision":"whole-zone","zoneMapping":"source-stated","applicability":"uncertain","applicabilityNotes":"The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.","source":"fps-eastern-us","sourceRecordId":"juglans-regia","sourceTaxon":"Juglans regia","taxonMatch":"exact","sourcePlacement":"Cold Hardiness Zone field in the recovered selector record","sourceVersion":"2016-wayback","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},{"minimum":"6a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-8,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"JURE80","sourceTaxon":"Juglans regia","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70687, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}]},"invasiveIn":[{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae8695","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Juglans regia","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021cgg), https://plants.usda.gov/home/plantProfile?symbol=JURE80"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"},"provenance":"cited"}],"fireEvidenceClass":"fire-resistant","recommendation":"on-list","fireSourceScopes":[],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[{"state":"L48","status":"invasive-reported","source":"us-riis-v2"}],"usdaZoneMin":"6a"},"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."}