{"id":"pteridium","license":"CC-BY-4.0","data":{"scientificName":"Pteridium","commonNames":["Pteridium"],"taxonRank":"genus","acceptedName":"Pteridium","family":"Dennstaedtiaceae","ids":{"gbifKey":5275011},"regions":["United Kingdom"],"plantForm":"perennial","evidence":[{"source":"fernandes-2020-selective-shrub-mgmt","verdict":"avoid","verdictRaw":"Control","claims":"Table 2 places this genus in the Control column. The authors describe the control group as heliophilous vegetation associated with fine fuels and traits linked to faster combustibility or greater flammability; this is a selective fuel-band management decision, not a global prohibition.","plantPart":"whole-plant","sourcePlacement":{"value":"selectively control in fuel-management bands in mainland Portugal","scheme":"portugal-selective-fuel-band-control"},"edition":"Fire 3(4), article 65","url":"https://doi.org/10.3390/fire3040065","documentDate":"2020-11-10T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"flamits","verdict":"not-rated","verdictRaw":"time to flaming (s): 3","score":{"value":3,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 15837; Ignitability measurement; plant part litter; fuel all; predrying no; device calorimeter; site Belcher2017-1; sampling . Primary study Belcher2017: Belcher, C. M., & Hudspith, V. A. (2017). Changes to Cretaceous surface fire behaviour influenced the spread of the early angiosperms. New Phytologist, 213, 1521-1532.","plantPart":"litter","original":"Belcher2017","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"},{"source":"flamits","verdict":"not-rated","verdictRaw":"calorific value (kcal/kg): 3035.73","score":{"value":3035.73,"scale":"FLAMITS — calorific value (kcal/kg)"},"claims":"FLAMITS record 15844; Combustibility measurement; plant part litter; fuel all; predrying no; device calorimeter; site Belcher2017-1; sampling . Primary study Belcher2017: Belcher, C. M., & Hudspith, V. A. (2017). Changes to Cretaceous surface fire behaviour influenced the spread of the early angiosperms. New Phytologist, 213, 1521-1532.","plantPart":"litter","original":"Belcher2017","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":"highly-flammable","ratingReason":"limited-evidence","recommendation":"avoid","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-25T00:00:00.000Z"},"localAssessmentInputs":{"stateDistribution":[],"nativeStates":[],"rangeAssertions":[],"usdaZoneMin":null,"usdaZoneMax":null,"hardinessAssertions":[],"hardinessSelection":{"status":"none","assertions":[]},"invasiveIn":[],"statusAssertions":[],"fireEvidenceClass":"highly-flammable","recommendation":"avoid","fireSourceScopes":[],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[]},"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."}