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Washingtonia filifera has both native and introduced relations cited in range evidence. The evidence table computes avoid for the palm. Its fire support is limited evidence, and 1 ecological invasive report is held apart from that result.
Same-form alternatives appear in related plants. For palmera de Califórnia, those five elements serve distinct purposes: distribution, recommendation, source depth, ecological context, and comparison. An alternative palm does not add support to filifera, and the range split does not strengthen or weaken the computed direction. The account keeps each selected fact within its cited role while preserving a route to comparable forms.
4 sourced range or established records. This is not an invasive warning.
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
1 ecological invasive report.
Broader regional context
Federal context
How to read this page
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
Native and introduced range evidence
These are exact U.S. botanical-area records from the cited range source. Native and
introduced describe biogeographic relationship, not fire performance or planting approval.
Doubtful and extinct rows stay visible but do not count as current presence.
The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.
Where its sources say to plant it
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Guía de pirojardinería: not suitable inside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (with its avoid rating)
The evidence
Grouped by what each source concluded. Primary evidence rated the plant itself
(a lab, field program, or original curation); corroboration compiled or
republished another source's rating and resolves to its root lineage.
Washingtonia filifera is rated “DESACONSEJADA” 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.
Listed without a rating (4)Corroboration (4 rows from 1 source)
4 cited rows from this source; its identity, lineage and tier are stated once.
Primary study Molina2019: Molina, J., Lora, A., Prades, C., & Silva, F. R. (2019). Roadside vegetation planning and conservation: New approach to prevent and mitigate wildfires based on fire ignition potential. Forest ecology and management, 444, 163-173.
Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Molina2019-1; sampling july and september.
