{"id":"betula-pendula","license":"CC-BY-4.0","data":{"scientificName":"Betula pendula","commonNames":["European white birch"],"taxonRank":"species","acceptedName":"Betula pendula","family":"Betulaceae","ids":{"usdaSymbol":"BEPE3","gbifKey":5331916,"itisTsn":19495,"wikidataQid":"Q156895","inatTaxonId":83992},"usdaZoneMin":"4a","zoneSource":"fps-2016","states":["CO","CT","DC","DE","IA","IL","IN","KY","MA","MD","ME","MI","NC","NH","NJ","NY","OH","OR","PA","VA","VT","WA","WI","WV"],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["CO"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 COL — Colorado"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["CT"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 CNT — Connecticut"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["IL"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 74 — North-Central U.S.A.","TDWG level 3 ILL — Illinois"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["MA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 MAS — Massachusetts"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["NH"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 NWH — New Hampshire"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["NY"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 NWY — New York"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["OH"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 OHI — Ohio"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["OR"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 ORE — Oregon"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["PA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 PEN — Pennsylvania"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["VT"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 VER — Vermont"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["WA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 WAS — Washington"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["WI"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 74 — North-Central U.S.A.","TDWG level 3 WIS — Wisconsin"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"native","geography":{"grain":"state","stateCodes":["AK"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 70 — Subarctic America","TDWG level 3 ASK — Alaska"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"}],"invasiveIn":[{"state":"AK","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["AK"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-AK-Plantae5777","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-04-29T00:00:00.000Z","sourceTaxon":{"name":"Betula pendula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["Alaska Exotic Plants Information Clearinghouse (AKEPIC) (2021), https://accs.uaa.alaska.edu/invasive-species/non-native-plant-species-list"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"}},{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae6620","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-03T00:00:00.000Z","sourceTaxon":{"name":"Betula pendula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021ra), https://plants.usda.gov/home/plantProfile?symbol=BEPE3"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"}}],"hardinessAssertions":[{"minimum":"4","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":"betula-pendula","sourceTaxon":"Betula pendula","taxonMatch":"exact","sourcePlacement":"Cold Hardiness Zone field in the recovered selector record","sourceVersion":"2016-wayback","asOf":"2026-08-26T00:00:00.000Z"},{"minimum":"3b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-33,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"BEPE3","sourceTaxon":"Betula pendula","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70017, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"tree","matureHeightFt":50,"sun":"part","waterNeed":"high","photo":{"file":"/images/plants/betula-pendula.jpg","sourceUrl":"https://www.inaturalist.org/photos/73723498","observationUrl":"https://www.inaturalist.org/observations/46481172","license":"cc-by","attribution":"(c) Нурхайдарова Татьяна, some rights reserved (CC BY)","fetchedOn":"2026-08-23T00:00:00.000Z"},"evidence":[{"source":"fps-eastern-us","verdict":"recommend","verdictRaw":"Betula pendula: Firewise (1); Betula platyphylla 'Whitespire': Firewise (1)","claims":"Betula pendula: Peeling papery bark and multi-trunk trees add fire potential. | Betula platyphylla 'Whitespire': Peeling papery bark and multi-trunk trees add fire potential.","sourcePlacement":{"value":"LZ3","scheme":"fps-landscape-zone"},"edition":"2016-wayback","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"osu-b921","verdict":"recommend","verdictRaw":"L flammability","claims":"Prone to bronze birch borer damage; not heat tolerant.","edition":"2006","url":"http://web.archive.org/web/20070714035936/http://www.firewise.org/usa/files/ohio_plantlist.pdf","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"va-firescapes","verdict":"recommend","verdictRaw":"L flammability","claims":"Prone to bronze birch borer damage. Not heat tolerant.","edition":"2009","url":"http://web.archive.org/web/20090709143736/http://pubs.ext.vt.edu/430/430-300/430-300.pdf","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"tfs-fire-resisting","verdict":"avoid","verdictRaw":"High Flammability","sourcePlacement":{"value":"remove from the Building Protection Zone; avoid in the Fuel Modified Zone","scheme":"tfs-bpz"},"edition":"2017","url":"https://www.fire.tas.gov.au/mysite/publications/1709%20Brochure.pdf","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"shan-2003-leaf-fire-ranking","verdict":"avoid","verdictRaw":"Author-named worst fire resistance","claims":"The authors place 白桦 among the ten taxa with the worst fire resistance after factor analysis of six litter-leaf traits.","claimOriginal":"抗火性最不好","plantPart":"litter","condition":"cured","edition":"2003","url":"https://html.rhhz.net/linyekexue/html/20030118.htm","documentDate":"2003-01-01T00:00:00.000Z","accessedOn":"2026-08-24T00:00:00.000Z"},{"source":"girona-pirojardineria-2020","verdict":"recommend","verdictRaw":"MUY RECOMENDADA","claims":"Betula pendula is rated “MUY RECOMENDADA” by the guide's qualitative IUF garden-suitability method. The method assumes species-specific care and integrates fire evidence with fuel structure, maintenance, origin, invasiveness, and expert fire-service experience.","sourcePlacement":{"value":"suitable inside or outside the 25-metre maximum-risk zone","scheme":"girona-2020-iuf-25m-suitability"},"edition":"2020 Spanish edition","url":"https://interior.gencat.cat/web/.content/home/030_arees_dactuacio/bombers/foc_forestal/publicacions_tecniques_i_normativa/guies_tecniques/prevencio_i_extincio/2020_Guia_de_pirojardineria_es.pdf","documentDate":"2020-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"flamits","verdict":"not-rated","verdictRaw":"ignition frequency (%): 100","score":{"value":100,"scale":"FLAMITS — ignition frequency (%)"},"claims":"FLAMITS record 1342; Ignitability measurement; plant part branches; fuel all; predrying yes; device grill; site Cui2020a-1; sampling ND. Primary study Cui2020a: Cui, X., Paterson, A. M., Wyse, S. V., Alam, M. A., Maurin, K. J. L., Pieper, R., ... Curran, T. J. (2020a). Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form. Nature Plants, 6, 355-359.","plantPart":"shoot","original":"Cui2020a","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":"maximum sample temperature (°C): 490","score":{"value":490,"scale":"FLAMITS — maximum sample temperature (°C)"},"claims":"FLAMITS record 1536; Combustibility measurement; plant part branches; fuel all; predrying yes; device grill; site Cui2020a-1; sampling ND. Primary study Cui2020a: Cui, X., Paterson, A. M., Wyse, S. V., Alam, M. A., Maurin, K. J. L., Pieper, R., ... Curran, T. J. (2020a). Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form. Nature Plants, 6, 355-359.","plantPart":"shoot","original":"Cui2020a","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":"burning duration (s): 16.3","score":{"value":16.3,"scale":"FLAMITS — burning duration (s)"},"claims":"FLAMITS record 1730; Sustainability measurement; plant part branches; fuel all; predrying yes; device grill; site Cui2020a-1; sampling ND. Primary study Cui2020a: Cui, X., Paterson, A. M., Wyse, S. V., Alam, M. A., Maurin, K. J. L., Pieper, R., ... Curran, T. J. (2020a). Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form. Nature Plants, 6, 355-359.","plantPart":"shoot","original":"Cui2020a","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":"estimated burnt biomass (%): 45.8","score":{"value":45.8,"scale":"FLAMITS — estimated burnt biomass (%)"},"claims":"FLAMITS record 1924; Consumability measurement; plant part branches; fuel all; predrying yes; device grill; site Cui2020a-1; sampling ND. Primary study Cui2020a: Cui, X., Paterson, A. M., Wyse, S. V., Alam, M. A., Maurin, K. J. L., Pieper, R., ... Curran, T. J. (2020a). Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form. Nature Plants, 6, 355-359.","plantPart":"shoot","original":"Cui2020a","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":"time to flaming (s): 1.71","score":{"value":1.71,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 14665; Ignitability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"time to flaming (s): 1.28","score":{"value":1.28,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 14666; Ignitability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"time to flaming (s): 1.01","score":{"value":1.01,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 14667; Ignitability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"maximum flame temperature (°C): 603.13","score":{"value":603.13,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 14677; Combustibility measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"maximum flame temperature (°C): 719.52","score":{"value":719.52,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 14678; Combustibility measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"maximum flame temperature (°C): 714.64","score":{"value":714.64,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 14679; Combustibility measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"flaming duration (s): 218.4","score":{"value":218.4,"scale":"FLAMITS — flaming duration (s)"},"claims":"FLAMITS record 14689; Sustainability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"flaming duration (s): 422.25","score":{"value":422.25,"scale":"FLAMITS — flaming duration (s)"},"claims":"FLAMITS record 14690; Sustainability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"flaming duration (s): 360.85","score":{"value":360.85,"scale":"FLAMITS — flaming duration (s)"},"claims":"FLAMITS record 14691; Sustainability measurement; plant part litter; fuel all; predrying yes; device burning bench; site Zhao2018-1; sampling november and december. Primary study Zhao2018: Zhao, W., van Logtestijn, R. S., van der Werf, G. R., van Hal, J. R., & Cornelissen, J. H. (2018). Disentangling effects of key coarse woody debris fuel properties on its combustion, consumption and carbon gas emissions during experimental laboratory fire. Forest ecology and management, 427, 275-288.","plantPart":"litter","original":"Zhao2018","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":"burning duration (s): 69.31","score":{"value":69.31,"scale":"FLAMITS — burning duration (s)"},"claims":"FLAMITS record 14739; Sustainability measurement; plant part leaves; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"leaf","original":"Zhao2019","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":"burning duration (s): 242.57","score":{"value":242.57,"scale":"FLAMITS — burning duration (s)"},"claims":"FLAMITS record 14740; Sustainability measurement; plant part twigs; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"shoot","original":"Zhao2019","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":"burnt biomass (%): 13","score":{"value":13,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 14747; Consumability measurement; plant part leaves; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"leaf","original":"Zhao2019","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":"burnt biomass (%): 79","score":{"value":79,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 14748; Consumability measurement; plant part twigs; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"shoot","original":"Zhao2019","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":"burnt biomass (%): 99.13","score":{"value":99.13,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 14755; Consumability measurement; plant part leaves; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"leaf","original":"Zhao2019","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":"burnt biomass (%): 99.78","score":{"value":99.78,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 14756; Consumability measurement; plant part twigs; fuel live; predrying yes; device burning bench; site Zhao2019-1; sampling november. Primary study Zhao2019: Zhao, W., van Logtestijn, R. S., van Hal, J. R., Dong, M., & Cornelissen, J. H. (2019). Non-additive effects of leaf and twig mixtures from different tree species on experimental litter-bed flammability. Plant and Soil, 436, 311-324.","plantPart":"shoot","original":"Zhao2019","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":"maximum flame temperature (°C): 344","score":{"value":344,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18682; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"maximum flame temperature (°C): 358","score":{"value":358,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18683; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"maximum flame temperature (°C): 370","score":{"value":370,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18684; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"maximum flame temperature (°C): 381","score":{"value":381,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18685; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"burnt biomass (%): 87.7","score":{"value":87.7,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 18686; Consumability measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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): 2985.57","score":{"value":2985.57,"scale":"FLAMITS — calorific value (kcal/kg)"},"claims":"FLAMITS record 18687; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"maximum flame temperature (°C): 358","score":{"value":358,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18688; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"burnt biomass (%): 86.5","score":{"value":86.5,"scale":"FLAMITS — burnt biomass (%)"},"claims":"FLAMITS record 18689; Consumability measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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): 12.8","score":{"value":12.8,"scale":"FLAMITS — calorific value (kcal/kg)"},"claims":"FLAMITS record 18690; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"maximum flame temperature (°C): 3057.22","score":{"value":3057.22,"scale":"FLAMITS — maximum flame temperature (°C)"},"claims":"FLAMITS record 18691; Combustibility measurement; plant part wood; fuel live; predrying yes; device thermal analyzer; site Hostikka2017-1; sampling ND. Primary study Hostikka2017: Hostikka, S., & Matala, A. (2017). Pyrolysis Model for Predicting the Heat Release Rate of Birch Wood. Combustion Science and Technology, 189, 1373–1393.","original":"Hostikka2017","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":"corbett-safer-gardens-2021","verdict":"avoid","verdictRaw":"‘very flammable’","claims":"The sample says Sheridan's green-leaf test recorded the second-fastest burning rate among 36 plants.","plantPart":"leaf","original":"Sheridan 1996","edition":"2021 book / public sample","url":"https://www.firesafergardens.com/s/Safer-Gardens-Plant-Flammability-Planning-for-Fire-first-8-chapters.pdf","documentDate":"2021-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"ak-dof-fire-resistant-vegetation-2005","verdict":"recommend","verdictRaw":"Following are a few of the plants that may be used in firewise landscapes in Alaska if placed and maintained appropriately.","claims":"Listed as Birch — B. pendula; the source conditions these examples on appropriate placement and maintenance.","plantPart":"whole-plant","sourcePlacement":{"value":"Trees","scheme":"Alaska DNR brochure sections"},"edition":"April 2005","url":"https://forestry.alaska.gov/Assets/pdfs/community/publications/05FireResistVeg.pdf","documentDate":"2005-04-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"mixed-evidence","ratingReason":"disputed","recommendation":"conflict","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-23T00:00:00.000Z","reviewNotes":"Photo auto-selected (top-voted iNat); human review pending."},"localAssessmentInputs":{"stateDistribution":["CO","CT","DC","DE","IA","IL","IN","KY","MA","MD","ME","MI","NC","NH","NJ","NY","OH","OR","PA","VA","VT","WA","WI","WV"],"nativeStates":[],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["CO"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 COL — Colorado"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["CT"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 CNT — Connecticut"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["IL"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 74 — North-Central U.S.A.","TDWG level 3 ILL — Illinois"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["MA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 MAS — Massachusetts"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["NH"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 NWH — New Hampshire"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["NY"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 NWY — New York"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["OH"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 OHI — Ohio"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["OR"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 ORE — Oregon"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["PA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 PEN — Pennsylvania"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["VT"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 75 — Northeastern U.S.A.","TDWG level 3 VER — Vermont"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["WA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 73 — Northwestern U.S.A.","TDWG level 3 WAS — Washington"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["WI"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 74 — North-Central U.S.A.","TDWG level 3 WIS — Wisconsin"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"native","geography":{"grain":"state","stateCodes":["AK"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 70 — Subarctic America","TDWG level 3 ASK — Alaska"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["CO","CT","DC","DE","IA","IL","IN","KY","MA","MD","ME","MI","NC","NH","NJ","NY","OH","OR","PA","VA","VT","WA","WI","WV"]},"provenance":"legacy-field"}],"usdaZoneMin":"4a","usdaZoneMax":null,"hardinessAssertions":[{"minimum":"4","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":"betula-pendula","sourceTaxon":"Betula pendula","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":"3b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-33,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"BEPE3","sourceTaxon":"Betula pendula","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70017, 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":"3b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-33,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"BEPE3","sourceTaxon":"Betula pendula","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70017, 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":"4","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":"betula-pendula","sourceTaxon":"Betula pendula","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":"3b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-33,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"BEPE3","sourceTaxon":"Betula pendula","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 70017, 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":"AK","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["AK"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-AK-Plantae5777","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-04-29T00:00:00.000Z","sourceTaxon":{"name":"Betula pendula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["Alaska Exotic Plants Information Clearinghouse (AKEPIC) (2021), https://accs.uaa.alaska.edu/invasive-species/non-native-plant-species-list"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"},"provenance":"cited"},{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae6620","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-03T00:00:00.000Z","sourceTaxon":{"name":"Betula pendula","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021ra), https://plants.usda.gov/home/plantProfile?symbol=BEPE3"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"},"provenance":"cited"}],"fireEvidenceClass":"mixed-evidence","recommendation":"conflict","fireSourceScopes":[{"source":"ak-dof-fire-resistant-vegetation-2005","sourceName":"Protect Your Home from Wildfire — Fire Resistant Vegetation and Landscaping","sourceUrl":"https://forestry.alaska.gov/Assets/pdfs/community/publications/05FireResistVeg.pdf","geography":{"grain":"state","stateCodes":["AK"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Alaska Division of Forestry opens with the wildfire threat to Alaskans and publishes Alaska firewise-landscape examples. FireApproved publishes 58 exact source owners from its 60 taxon entries and holds the taxon-free fern label. State publication scope does not establish suitability for every Alaska climate, site, or home-ignition-zone placement.","sourceVersion":"Alaska-DOF-Fire-Resistant-Vegetation-2005-04-27","asOf":"2005-04-27T00:00:00.000Z"},{"source":"osu-b921","sourceName":"Firewise Landscaping (OSU Extension Bulletin 921)","sourceUrl":"http://web.archive.org/web/20070714035936/http://www.firewise.org/usa/files/ohio_plantlist.pdf","geography":{"grain":"state","stateCodes":["OH"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Ohio State University Extension Bulletin 921 is an Ohio publication that describes Ohio fire seasons and landscape conditions and labels nativity to Ohio. FireApproved publishes 352 exact source-owning plant records from its eight rated tables. This historical publication scope does not assert current extension endorsement or that a listed plant suits every Ohio site.","sourceVersion":"OSU-Extension-Bulletin-921-2006","asOf":"2006-03-01T00:00:00.000Z"},{"source":"va-firescapes","sourceName":"Virginia Firescapes — Firewise Landscaping for Woodland Homes (430-300)","sourceUrl":"http://web.archive.org/web/20090709143736/http://pubs.ext.vt.edu/430/430-300/430-300.pdf","geography":{"grain":"state","stateCodes":["VA"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Virginia Cooperative Extension's publication opens with Virginia wildfire conditions, identifies its Virginia Firewise Landscaping Task Force, and labels plants native to Virginia. FireApproved publishes 306 exact source owners. Publication scope does not establish parcel suitability or current endorsement of this archived 2009 list.","sourceVersion":"Virginia-VCE-430-300-2009","asOf":"2009-04-15T00:00:00.000Z"}],"firePerformanceConditions":[{"condition":"cured","evidence":[{"source":"shan-2003-leaf-fire-ranking","verdict":"avoid","url":"https://html.rhhz.net/linyekexue/html/20030118.htm","claims":"The authors place 白桦 among the ten taxa with the worst fire resistance after factor analysis of six litter-leaf traits.","evidenceIndex":4}]}],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":["AK"],"invasiveIn":[{"state":"AK","status":"invasive-reported","source":"us-riis-v2"},{"state":"L48","status":"invasive-reported","source":"us-riis-v2"}],"usdaZoneMin":"3b"},"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."}