Home / Plants / Grow / Crown fern

Crown fern

Blechnum discolor (accepted: Lomaria discolor) · Blechnaceae · all Blechnum records · also called Petipeti, Piupiu

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: Fire-resistant — location does not change the cited classification.
Fire-performance conditions: No test or rating condition is normalized.
Fire ecology context: No section-reviewed fire-ecology context is normalized.
Placement evidence: 0 source placement records; source schemes remain separate.
Evidence regions: Global; New Zealand
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: No hardiness value is normalized.

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.

Crown fern (Blechnum discolor) — Photo: (c) Heidi Meudt, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: perennial
Region: New Zealand
Rated in: Global; New Zealand
Family: Blechnaceae
Evidence: 7 cited sources

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.

Listed without a rating (6)

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

6 cited rows from this source; its identity, lineage and tier are stated once.
- “temperature at smoke (°C): 86.62” · score 86.62 (FLAMITS — temperature at smoke (°C))
  
  FLAMITS record 8321; Ignitability measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.
- “temperature at smoke (°C): 109.3” · score 109.3 (FLAMITS — temperature at smoke (°C))
  
  FLAMITS record 8322; Ignitability measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.
- “temperature at flaming (°C): 224.78” · score 224.78 (FLAMITS — temperature at flaming (°C))
  
  FLAMITS record 8536; Ignitability measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.
- “temperature at flaming (°C): 157.82” · score 157.82 (FLAMITS — temperature at flaming (°C))
  
  FLAMITS record 8537; Ignitability measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.
- “temperature increase rate (°C/s): 12.74” · score 12.74 (FLAMITS — temperature increase rate (°C/s))
  
  FLAMITS record 8751; Combustibility measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.
- “temperature increase rate (°C/s): 15.59” · score 15.59 (FLAMITS — temperature increase rate (°C/s))
  
  FLAMITS record 8752; Combustibility measurement; plant part leaves; fuel live; predrying yes; device muffle furnace; site Mason2016-11; sampling summer. Primary study Mason2016: Mason, N. W. H., Frazao, C., Buxton, R. P., & Richardson, S. J. (2016). Fire form and function: evidence for exaptive flammability in the New Zealand flora. Plant Ecology, 217, 645-659.

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

Profiles: GBIF · iNaturalist · Wikidata ·

Blechnum discolor (Crown fern, Petipeti, Piupiu). FireApproved. https://fireapproved.com/plants/blechnum-discolor/. Last verified 2026-08-23.