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Marram grass carries an avoid recommendation on the evidence table. The Calamagrostis arenaria pack is limited evidence; its trait set includes invasive-risk, and same-form alternatives are cited in related plants.
Range evidence and the genus index remain contextual routes for this record. They do not add a source row or change the avoid direction. On arenaria, recommendation, pack depth, trait, and alternative set remain distinct facts. A return to the accepted rows keeps the recommendation inspectable while comparisons stay in their cited section. The invasive-risk trait remains a trait entry, not a further recommendation.
Highly flammable — location does not change the cited classification.
Fire-performance conditions
Fire ecology context
Placement evidence
Evidence regions
New Zealand
Maintenance
2. Why this plant is relevant here
State distribution
Native range
Introduced / established
6 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
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.
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)
Low Flammability Plants directory — Fire and Emergency New Zealand (plant flammability testing at Lincoln University) · 2026 · original sourcePrimary evidenceLab-testedlineage: lincoln-nz-tree
“High flammability”
High flammability classification. On FENZ's high-flammability environmental weeds list (2024 DOC list).
