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knobcone pine

Pinus attenuata · Pinaceae · all Pinus records · also called Pinus attenuata · Wikipedia

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Rated in
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On this lot

1. Fire evidence and conditions

Fire evidence
Mixed evidence — location does not change the cited classification.
Evidence regions
Global

2. Why this plant is relevant here

State distribution
Documented in CA, OR.
Native range
Current cited native range in CA, OR.

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.

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.

Current native

2

exact source areas

Current introduced

0

exact source areas

Qualified

0

doubtful or extinct source rows

2 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • California (CA)
  • Oregon (OR)

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.

Listed without a rating (23)
Corroboration (23 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

    23 cited rows from this source; its identity, lineage and tier are stated once.

    • Primary study Fonda2001: Fonda, R. W. (2001). Burning characteristics of needles from eight pine species. Forest Science, 47, 390-396.

      Shared row context: plant part leaves; fuel live; predrying yes; device burning bench; site Fonda2001-6; sampling ND.

      • Shared measurement context: Combustibility measurement.

        • “flame height (cm): 67.2”

          FLAMITS record 3377.

        • “mass loss rate (g/s): 0.03”

          FLAMITS record 3381.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 92.8”

          FLAMITS record 3378.

        • “burning duration (s): 423.8”

          FLAMITS record 3379.

      • “burnt biomass (%): 90.4”

        FLAMITS record 3380; Consumability measurement.

    • Primary study Fonda2004: Fonda, R., & Varner, J. (2004). Burning characteristics of cones from eight pine species. Northwest Science, 78, 322-333.

      Shared row context: plant part cones; fuel dead; predrying yes; device burning bench; site Fonda2004-5; sampling august to october.

      • Shared measurement context: Combustibility measurement.

        • “flame height (cm): 49.3”

          FLAMITS record 3416.

        • “mass loss rate (g/s): 0.03”

          FLAMITS record 3421.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 740”

          FLAMITS record 3417.

        • “smouldering duration (s): 1262”

          FLAMITS record 3418.

        • “burning duration (s): 2002”

          FLAMITS record 3419.

      • “burnt biomass (%): 68”

        FLAMITS record 3420; Consumability measurement.

    • Primary study vanWagtendonk1998: Van Wagdendonk, J., Sydoriak, W. M., & Benedict, J. M. (1998). Heat content variation of Sierra Nevada conifers. International Journal of Wildland Fire, 8, 147-158.

      Shared row context: Combustibility measurement; fuel live; predrying yes; device calorimeter; site vanWagtendonk1998-1; sampling ND.

      • Shared measurement context: plant part leaves.

        • “calorific value (kcal/kg): 869.4”

          FLAMITS record 13419.

        • “calorific value (kcal/kg): 4999.04”

          FLAMITS record 13421.

      • Shared measurement context: plant part litter.

        • “calorific value (kcal/kg): 735.65”

          FLAMITS record 13420.

        • “calorific value (kcal/kg): 4884.4”

          FLAMITS record 13422.

      • Shared measurement context: plant part wood.

        • “calorific value (kcal/kg): 4884.4”

          FLAMITS record 13495.

        • “calorific value (kcal/kg): 4784.08”

          FLAMITS record 13496.

        • “calorific value (kcal/kg): 4987.1”

          FLAMITS record 13497.

        • “calorific value (kcal/kg): 4877.23”

          FLAMITS record 13498.

    • Primary study Varner2022: Varner, J. M., Shearman, T. M., Kane, J. M., Banwell, E., Jules, E., & Stambaugh, M. (2022). Understanding flammability and bark thickness in the genus Pinus using a phylogenetic approach. Scientific Reports, 12, 7384.

      Shared row context: plant part litter; fuel all; predrying yes; device burning bench; site Varner2022-2; sampling ND.

      • “flame height (cm): 79.9”

        FLAMITS record 15649; Combustibility measurement.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 53.4”

          FLAMITS record 15650.

        • “smouldering duration (s): 635.6”

          FLAMITS record 15651.

      • “burnt biomass (%): 89.5”

        FLAMITS record 15652; Consumability measurement.

Fire-resistant trees instead

quaking aspen
Populus tremuloides sweetgum
Liquidambar styraciflua Lombardy poplar
Populus nigra 'Italica' boxelder
Acer negundo honeylocust
Gleditsia triacanthos Oregon white oak
Quercus garryana
Same genus in the directory · the Pinus group page

Last verified 2026-08-25. JSON (CC BY 4.0)

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

Pinus attenuata (Pinus attenuata). FireApproved. https://fireapproved.com/plants/pinus-attenuata/. Last verified 2026-08-25.