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soapbark (Quillaja saponaria)
Photo: (c) Patricio Novoa, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

soapbark

Quillaja saponaria · Quillajaceae · also called Soapbark tree · Wikipedia

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Form
tree
Region
Chile
Rated in
Global; Peñuelas Lake National Reserve, Valparaíso, Chile
On this lot

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.
Evidence regions
Global; Peñuelas Lake National Reserve, Valparaíso, Chile

2. Why this plant is relevant here

3. Legal, ecological, and broader status

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.

Conditions in the fire evidence

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

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.

Mid-scale / conditional (2)

Listed without a rating (6)
Corroboration (6 rows from 1 source)
  • 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.

    • Primary study Guerrero2021: Guerrero, F., Hernández, C., Toledo, M., Espinoza, L., Carrasco, Y., Arriagada, A., ... Carmona, C. (2021). Leaf thermal and chemical properties as natural drivers of plant flammability of native and exotic tree species of the valparaíso region, Chile. International journal of environmental research and public health, 18, 7191.

      Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Guerrero2021-1; sampling summer.

      • Shared measurement context: Ignitability measurement.

        • “time to flaming (s): 20.82”

          FLAMITS record 4617.

        • “ignition frequency (%): 50”

          FLAMITS record 4632.

        • “flammability value: 3”

          FLAMITS record 4637.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 11.62”

          FLAMITS record 4622.

        • “burning duration (s): 57.96”

          FLAMITS record 4627.

      • “calorific value (kcal/kg): 4643.16”

        FLAMITS record 4642; Combustibility measurement.

Fire-resistant trees instead

Last verified 2026-08-24. JSON (CC BY 4.0)

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

Quillaja saponaria (Soapbark tree). FireApproved. https://fireapproved.com/plants/quillaja-saponaria/. Last verified 2026-08-24.