{"id":"populus-tremula","license":"CC-BY-4.0","data":{"scientificName":"Populus tremula","commonNames":["Populus davidiana"],"taxonRank":"species","acceptedName":"Populus tremula","family":"Salicaceae","ids":{"usdaSymbol":"POTR10","gbifKey":8205768},"states":["MA","MO"],"statusAssertions":[{"status":"introduced-established","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae9966","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2017-11-21T00:00:00.000Z","sourceTaxon":{"name":"Populus tremula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"C3","label":"established (category C3)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dus), https://plants.usda.gov/home/plantProfile?symbol=POTR10"],"taxonProjection":{"basis":"exact-taxon","notes":"unique exact scientific/accepted name, rank, and family match"}}],"plantForm":"tree","evidence":[{"source":"flamits","verdict":"not-rated","verdictRaw":"temperature at flaming (°C): 268","score":{"value":268,"scale":"FLAMITS — temperature at flaming (°C)"},"claims":"FLAMITS record 12540; Ignitability measurement; plant part leaves; fuel live; predrying no; device ignition temperature tester; site Shan2008-1; sampling ND. Primary study Shan2008: Shan, Y., Liu, N., & Shu, L. (2008). Flammability ranking of foliage species by factor analysis of physical and chemical pyric properties. Fire and Materials: An International Journal, 32, 371-382.","plantPart":"leaf","original":"Shan2008","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): 4329.58","score":{"value":4329.58,"scale":"FLAMITS — calorific value (kcal/kg)"},"claims":"FLAMITS record 12541; Combustibility measurement; plant part leaves; fuel live; predrying no; device calorimeter; site Shan2008-1; sampling ND. Primary study Shan2008: Shan, Y., Liu, N., & Shu, L. (2008). Flammability ranking of foliage species by factor analysis of physical and chemical pyric properties. Fire and Materials: An International Journal, 32, 371-382.","plantPart":"leaf","original":"Shan2008","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":"mixed-evidence","ratingReason":"limited-evidence","recommendation":"candidate","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-25T00:00:00.000Z","reviewNotes":"FLAMITS measurements are retained as non-voting evidence; the database publishes no cross-variable directional threshold."},"localAssessmentInputs":{"stateDistribution":["MA","MO"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["MA","MO"]},"provenance":"legacy-field"}],"usdaZoneMin":null,"usdaZoneMax":null,"hardinessAssertions":[],"hardinessSelection":{"status":"none","assertions":[]},"invasiveIn":[],"statusAssertions":[{"status":"introduced-established","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae9966","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2017-11-21T00:00:00.000Z","sourceTaxon":{"name":"Populus tremula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"C3","label":"established (category C3)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dus), https://plants.usda.gov/home/plantProfile?symbol=POTR10"],"taxonProjection":{"basis":"exact-taxon","notes":"unique exact scientific/accepted name, rank, and family match"},"provenance":"cited"}],"fireEvidenceClass":"mixed-evidence","recommendation":"candidate","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."}