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Horizontal common cypress
Cupressus sempervirens var. horizontalis
Your local evidence lens
Separate evidence questions, never one approval badge
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
- 2 conditions stated in cited fire-evidence rows.
- Fire ecology context
- No section-reviewed fire-ecology context is normalized.
- Placement evidence
- 2 source placement records; source schemes remain separate.
- Evidence regions
- Valencia, Spain / Mediterranean
- 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
- No state distribution is normalized.
- 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.
- Form
- tree
- USDA hardiness
- Only uncertain or inapplicable source rows; no primary zone projected
- Rated in
- Valencia, Spain / Mediterranean
- Family
- Cupressaceae
- Evidence
- 2 cited sources
Plant hardiness evidence
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Eastern United States Fire Performance Plant Selector
Source prints 6 · single-value meaning unresolved
Conditions in the fire evidence
Where its sources say to plant it
- Possible land management uses of common cypress to reduce…: selected-variety cypress barrier proposed for further study as a complementary Mediterranean management tool
- Possible land management uses of common cypress to reduce…: selected-variety cypress barrier proposed for further study as a complementary Mediterranean management tool
The evidence
Mid-scale / conditional (2)
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“relatively resistant to ignition”
The study tested live crown material with April-August fuel moisture content of 84-95%. The authors attribute relative ignition resistance to high ash content, high critical heat flux, high time to ignition, and the leaves' ability to retain summer water. They use separate methods for the other flammability components and do not give an overall low-flammability class.
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“low ignitability of crown and litter cypress samples”
The study tested dead litter at 14 ± 2% fuel moisture content from May-August and reports high time to ignition. The management discussion describes the deep dense litter as difficult to ignite, while still keeping ignitability, sustainability, combustibility, and consumability distinct rather than assigning one overall class.
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