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Singleleaf ash

Fraxinus ornus 'Rotundifolia' (accepted: Fraxinus ornus) · Oleaceae · all Fraxinus records

Your local evidence lens

Separate evidence questions, never one approval badge

Set a ZIP to compare this record with state distribution, native range, USDA hardiness, and invasive records.

A genus split is not a placement verdict. Set a ZIP to read the local documented split.

1. Fire evidence and conditions

Fire evidence: Mixed evidence — location does not change the cited classification.
Fire-performance conditions: 1 condition stated in cited fire-evidence rows.
Fire ecology context: No section-reviewed fire-ecology context is normalized.
Placement evidence: 1 source placement record; source schemes remain separate.
Evidence regions: Córdoba, southern Spain; Global; eastern US
Maintenance: No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.

2. Why this plant is relevant here

State distribution: Documented in DC, DE, MD, NJ, OH, PA, WV.
Native range: No current cited or legacy state native range is normalized.
Introduced / established: No introduced or established row is normalized; that does not prove native status.
USDA hardiness: Only uncertain or inapplicable hardiness rows are cited; no primary zone is projected.

3. Legal, ecological, and broader status

Legal-list status: Set a location for an exact legal-list result; source silence is not clearance.
Seed-list status: Set a location to compare the separate state noxious-weed seed layer.
Reported invasive here: No ecological invasive report is normalized; that does not prove noninvasiveness.
Broader regional context: Aggregate AK, HI, and L48 evidence is shown only as regional context, never as an exact-state finding.
Federal context: Federal designations remain separate from state legal-list results.

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.

Singleleaf ash (Fraxinus ornus 'Rotundifolia') — Photo: (c) Ioannis Magouras, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: tree
USDA hardiness: Only uncertain or inapplicable source rows; no primary zone projected
Mature height: ~25 ft
Light: Full sun
Grows in: DC, DE, MD, NJ, OH, PA, WV
Rated in: Córdoba, southern Spain; Global; eastern US
Family: Oleaceae
Evidence: 14 cited sources

Plant hardiness evidence

These values describe the plant source. Your ZIP zone comes from the separate 2023 USDA Plant Hardiness Zone Map. Whole-zone values stay whole-zone, and a single unresolved value is not treated as a tolerance range. Different source boundaries stay separate: overlapping statements are compared independently, while only ranges with no shared zone are called a conflict.

Eastern United States Fire Performance Plant Selector · record fraxinus-ornus-rotundifolia · 2016-wayback · as of 2026-08-26

Source prints 5 · single-value meaning unresolved · whole zone precision · source stated

Source taxon: Fraxinus ornus 'Rotundifolia' · exact match.

Source location: Cold Hardiness Zone field in the recovered selector record.

Not used for comparison: The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.

Conditions in the fire evidence

These describe tested or rated plant material. They are not horticultural maintenance instructions.

green: The ignition index based on flammability of vegetation improves planning in the WUI evidence row

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.

Eastern United States Fire Performance Plant Selector: Landscape Zone 3 — 10–30 ft from the structure; thin vegetation, remove debris, and minimize plant massing [Fire Performance Plant Selector landscape zone] (with its recommendation)

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.

Avoids (1)

The ignition index based on flammability of vegetation improves planning in the WUI — Landscape and Urban Planning (Molina, Martín, Rodríguez y Silva & Herrera) · 2017 · original source Primary evidence Lab-tested lineage: molina-uco-tree

“Extremely flammable (Valette 5)” · score 5 (valette-0-5-live-leaf) · condition: green

Table 2 reports 106.76% foliar moisture, 6.7 s mean time to ignition, and 10.06 s mean flame duration across 200 live-leaf samples.

Listed without a rating (12)

FLAMITS: FLAMmability plant traiTS database — Dryad / Global Ecology and Biogeography · Dryad version 9 · original source Corroboration Trait database lineage: meta-aggregator

12 cited rows from this source; its identity, lineage and tier are stated once.
- “time to flaming (s): 6.7” · score 6.7 (FLAMITS — time to flaming (s))
  
  FLAMITS record 9297; Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Molina2017-1; sampling summer. Primary study Molina2017: Molina, J. R., Martín, T., Rodríguez Y Silva, F., & Herrera, M. Á. (2017). The ignition index based on flammability of vegetation improves planning in the wildland-urban interface: A case study in Southern Spain. Landscape and Urban Planning, 158, 129-138.
- “flaming duration (s): 10.06” · score 10.06 (FLAMITS — flaming duration (s))
  
  FLAMITS record 9315; Sustainability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Molina2017-1; sampling summer. Primary study Molina2017: Molina, J. R., Martín, T., Rodríguez Y Silva, F., & Herrera, M. Á. (2017). The ignition index based on flammability of vegetation improves planning in the wildland-urban interface: A case study in Southern Spain. Landscape and Urban Planning, 158, 129-138.
- “flammability value: 5” · score 5 (FLAMITS — flammability value)
  
  FLAMITS record 9333; Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Molina2017-1; sampling summer. Primary study Molina2017: Molina, J. R., Martín, T., Rodríguez Y Silva, F., & Herrera, M. Á. (2017). The ignition index based on flammability of vegetation improves planning in the wildland-urban interface: A case study in Southern Spain. Landscape and Urban Planning, 158, 129-138.
- “time to flaming (s): 7.86” · score 7.86 (FLAMITS — time to flaming (s))
  
  FLAMITS record 10493; Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Petriccione2006-1; sampling may to june. Primary study Petriccione2006: Petriccione, M. (2006). Infiammabilità della lettiera di diverse specie vegetali di ambiente mediterráneo. Tesi Di Dottorato. Università Degli Studi Di Napoli Federico II.
- “burning duration (s): 10.78” · score 10.78 (FLAMITS — burning duration (s))
  
  FLAMITS record 10494; Sustainability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Petriccione2006-1; sampling may to june. Primary study Petriccione2006: Petriccione, M. (2006). Infiammabilità della lettiera di diverse specie vegetali di ambiente mediterráneo. Tesi Di Dottorato. Università Degli Studi Di Napoli Federico II.
- “ignition frequency (%): 50” · score 50 (FLAMITS — ignition frequency (%))
  
  FLAMITS record 10495; Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Petriccione2006-1; sampling may to june. Primary study Petriccione2006: Petriccione, M. (2006). Infiammabilità della lettiera di diverse specie vegetali di ambiente mediterráneo. Tesi Di Dottorato. Università Degli Studi Di Napoli Federico II.
- “flammability value: 5” · score 5 (FLAMITS — flammability value)
  
  FLAMITS record 10496; Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Petriccione2006-1; sampling may to june. Primary study Petriccione2006: Petriccione, M. (2006). Infiammabilità della lettiera di diverse specie vegetali di ambiente mediterráneo. Tesi Di Dottorato. Università Degli Studi Di Napoli Federico II.
- “time to flaming (s): 41.02” · score 41.02 (FLAMITS — time to flaming (s))
  
  FLAMITS record 10906; Ignitability measurement; plant part bark; fuel live; predrying no; device burning bench; site Rasooli2021-1; sampling november. Primary study Rasooli2021: Rasooli, S. B., Rashidi, S., & Shabanian, N. (2021). Fire sensitivity of broadleaf tree species in plantations of Kurdistan, Iran. Journal of Forestry Research, 32, 1167-1176.
- “flaming duration (s): 31.15” · score 31.15 (FLAMITS — flaming duration (s))
  
  FLAMITS record 10907; Sustainability measurement; plant part bark; fuel live; predrying no; device burning bench; site Rasooli2021-1; sampling november. Primary study Rasooli2021: Rasooli, S. B., Rashidi, S., & Shabanian, N. (2021). Fire sensitivity of broadleaf tree species in plantations of Kurdistan, Iran. Journal of Forestry Research, 32, 1167-1176.
- “time to flaming (s): 124.49” · score 124.49 (FLAMITS — time to flaming (s))
  
  FLAMITS record 10918; Ignitability measurement; plant part wood; fuel live; predrying no; device burning bench; site Rasooli2021-1; sampling november. Primary study Rasooli2021: Rasooli, S. B., Rashidi, S., & Shabanian, N. (2021). Fire sensitivity of broadleaf tree species in plantations of Kurdistan, Iran. Journal of Forestry Research, 32, 1167-1176.
- “flaming duration (s): 40.33” · score 40.33 (FLAMITS — flaming duration (s))
  
  FLAMITS record 10919; Sustainability measurement; plant part wood; fuel live; predrying no; device burning bench; site Rasooli2021-1; sampling november. Primary study Rasooli2021: Rasooli, S. B., Rashidi, S., & Shabanian, N. (2021). Fire sensitivity of broadleaf tree species in plantations of Kurdistan, Iran. Journal of Forestry Research, 32, 1167-1176.
- “time to flaming (s): 12.51” · score 12.51 (FLAMITS — time to flaming (s))
  
  FLAMITS record 10926; Ignitability measurement; plant part leaves; fuel live; predrying no; device burning bench; site Rasooli2021-1; sampling july. Primary study Rasooli2021: Rasooli, S. B., Rashidi, S., & Shabanian, N. (2021). Fire sensitivity of broadleaf tree species in plantations of Kurdistan, Iran. Journal of Forestry Research, 32, 1167-1176.

Fire-resistant trees instead

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Wild black cherry
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White oak
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Fire-resistant trees listed above

Last verified 2026-08-23. JSON (CC BY 4.0)

Profiles: USDA PLANTS · GBIF · iNaturalist · Wikidata · ITIS

Fraxinus ornus 'Rotundifolia' (Singleleaf ash). FireApproved. https://fireapproved.com/plants/fraxinus-ornus-rotundifolia/. Last verified 2026-08-23.