{"id":"nassella-tenuissima","license":"CC-BY-4.0","data":{"scientificName":"Nassella tenuissima","commonNames":["Nassella tenuissima"],"taxonRank":"species","acceptedName":"Nassella tenuissima","family":"Poaceae","ids":{"usdaSymbol":"NATE3","gbifKey":5289833},"states":["CA","NM","TX"],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["CA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 76 — Southwestern U.S.A.","TDWG level 3 CAL — California"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"native","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":"native","geography":{"grain":"state","stateCodes":["NM"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 77 — South-Central U.S.A.","TDWG level 3 NWM — New Mexico"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"native","geography":{"grain":"state","stateCodes":["TX"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 77 — South-Central U.S.A.","TDWG level 3 TEX — Texas"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"}],"plantForm":"grass","evidence":[{"source":"flamits","verdict":"not-rated","verdictRaw":"time to flaming (s): 1.212","score":{"value":1.212,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 15949; Ignitability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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): 22.992","score":{"value":22.992,"scale":"FLAMITS — flaming duration (s)"},"claims":"FLAMITS record 15950; Sustainability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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":"smouldering duration (s): 18.084","score":{"value":18.084,"scale":"FLAMITS — smouldering duration (s)"},"claims":"FLAMITS record 15951; Sustainability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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":"flame height (cm): 70.6","score":{"value":70.6,"scale":"FLAMITS — flame height (cm)"},"claims":"FLAMITS record 15952; Combustibility measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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): 1.2625","score":{"value":1.2625,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 15953; Ignitability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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): 8.53","score":{"value":8.53,"scale":"FLAMITS — flaming duration (s)"},"claims":"FLAMITS record 15954; Sustainability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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":"smouldering duration (s): 6.29","score":{"value":6.29,"scale":"FLAMITS — smouldering duration (s)"},"claims":"FLAMITS record 15955; Sustainability measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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":"flame height (cm): 27.5","score":{"value":27.5,"scale":"FLAMITS — flame height (cm)"},"claims":"FLAMITS record 15956; Combustibility measurement; plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019. Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.","plantPart":"whole-plant","original":"Gao2022","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":"travis-county-agrilife-firewise","verdict":"avoid","verdictRaw":"Plants to Avoid for Zone 1 (within 30′ of Structure)","claims":"Listed as Mexican Feathergrass (Wiregrass) — Nassella tenuissima. The page says Zone 1 entries should be restricted to zones 2 or 3; all-zone entries are highly flammable due to volatile oils or growth habit.","plantPart":"whole-plant","sourcePlacement":{"value":"Perennials","scheme":"Travis County Firewise page sections"},"edition":"page modified 2024-01-16","url":"https://travis-tx.tamu.edu/about-2/horticulture/basic-landscape-design/firewise-landscaping/","documentDate":"2024-01-16T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"sun-city-tx-firewise-plant-guide-2015","verdict":"avoid","verdictRaw":"high","claims":"The table rates Mexican Feathergrass, wiregrass — Nassella tenuissima high for flammability hazard, defined as the ease a plant can burn at high temperatures for a prolonged time.","plantPart":"whole-plant","sourcePlacement":{"value":"Ornamental Grasses","scheme":"Sun City plant-table sections"},"edition":"updated January 14, 2015","url":"http://web.archive.org/web/20250114065810/https://www.sariverauthority.org/wp-content/uploads/2023/09/FIREWISE-PLANT-LIST-Sun-City.pdf","documentDate":"2015-01-14T00:00:00.000Z","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":["CA","NM","TX"],"nativeStates":[],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["CA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 76 — Southwestern U.S.A.","TDWG level 3 CAL — California"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"native","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":"native","geography":{"grain":"state","stateCodes":["NM"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 77 — South-Central U.S.A.","TDWG level 3 NWM — New Mexico"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z","provenance":"cited"},{"relation":"native","geography":{"grain":"state","stateCodes":["TX"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 77 — South-Central U.S.A.","TDWG level 3 TEX — Texas"]},"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":["CA","NM","TX"]},"provenance":"legacy-field"}],"usdaZoneMin":null,"usdaZoneMax":null,"hardinessAssertions":[],"hardinessSelection":{"status":"none","assertions":[]},"invasiveIn":[],"statusAssertions":[],"fireEvidenceClass":"mixed-evidence","recommendation":"candidate","fireSourceScopes":[{"source":"sun-city-tx-firewise-plant-guide-2015","sourceName":"Firewise Plant Guide","sourceUrl":"http://web.archive.org/web/20250114065810/https://www.sariverauthority.org/wp-content/uploads/2023/09/FIREWISE-PLANT-LIST-Sun-City.pdf","geography":{"grain":"aggregate-region","stateCodes":["TX"],"regions":["Sun City Texas, Georgetown"]},"completeness":"partial","reviewStatus":"reviewed","scope":"The guide is authored for the Sun City Texas community in Georgetown. FireApproved publishes 142 exact owners only as community-level context. It is an archived HOA exhibit with unknown rating lineage, not a current statewide Texas source or an independent Tier 1 determination.","sourceVersion":"Sun-City-Texas-Firewise-guide-2015-01-14","asOf":"2015-01-14T00:00:00.000Z"},{"source":"travis-county-agrilife-firewise","sourceName":"Firewise Landscaping (Travis County)","sourceUrl":"https://travis-tx.tamu.edu/about-2/horticulture/basic-landscape-design/firewise-landscaping/","geography":{"grain":"aggregate-region","stateCodes":["TX"],"regions":["Travis County","Austin area"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Texas A&M AgriLife Extension publishes this page through its Travis County horticulture program. FireApproved publishes 56 exact owners and retains the source's zone and warning conditions. This is county/Austin regional context, not a second statewide Texas table or site clearance.","sourceVersion":"Travis-County-AgriLife-Firewise-2024-01-16","asOf":"2024-01-16T00:00:00.000Z"}],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":["CO","NM","TX"],"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."}