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hoaryleaf ceanothus

Ceanothus crassifolius · Rhamnaceae · all Ceanothus records · also called Ceanothus crassifolius · Wikipedia

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Form
shrub
Rated in
Global
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.
Native range
Current cited native range in CA.

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

1

exact source area

Current introduced

0

exact source areas

Qualified

0

doubtful or extinct source rows

1 native source area · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • California (CA)

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 (43)
Corroboration (43 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

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

    • “temperature at flaming (°C): 319”

      FLAMITS record 3302; Ignitability measurement; plant part leaves; fuel live; predrying no; device flat flame burner; site Engstrom2004-1; sampling ND. Primary study Engstrom2004: Engstrom, J. D., Butler, J. K., Smith, S. G., Baxter, L. L., Fletcher, T. H., & Weise, D. R. (2004). Ignition behavior of live California chaparral leaves. Combustion Science and Technology, 176, 1577-1591.

    • Primary study Fletcher2007: Fletcher, T. H., Pickett, B. M., Smith, S. G., Spittle, G. S., Woodhouse, M. M., Haake, E., & Weise, D. R. (2007). Effects of moisture on ignition behavior of moist California chaparral and Utah leaves. Combustion Science and Technology, 179, 1183-1203.

      Shared row context: Ignitability measurement; plant part leaves; fuel live; predrying no; device flat flame burner; site Fletcher2007-1; sampling ND.

      • “temperature at flaming (°C): 455.7”

        FLAMITS record 3340.

      • “time to flaming (s): 304.8”

        FLAMITS record 3346.

    • Primary study McAllister2017: McAllister, S., & Weise, D. (2017). Effects of season on ignition of live wildland fuels using the forced ignition and flame spread test apparatus. Combustion Science and Technology, 189, 231-247.

      Shared row context: Ignitability measurement; plant part leaves; fuel live; predrying no; device scale wind tunnel; site McAllister2017-2.

      • Shared measurement context: sampling may.

        • “time to flaming (s): 25.88”

          FLAMITS record 9097.

        • “time to flaming (s): 30.04”

          FLAMITS record 9107.

      • “time to flaming (s): 18.87”

        FLAMITS record 9098; sampling june.

      • “time to flaming (s): 21.19”

        FLAMITS record 9099; sampling july.

      • “time to flaming (s): 17.94”

        FLAMITS record 9100; sampling august.

      • “time to flaming (s): 24.21”

        FLAMITS record 9101; sampling october.

      • “time to flaming (s): 26.44”

        FLAMITS record 9102; sampling november.

      • “time to flaming (s): 26.06”

        FLAMITS record 9103; sampling january.

      • “time to flaming (s): 26.62”

        FLAMITS record 9104; sampling february.

      • “time to flaming (s): 30.47”

        FLAMITS record 9105; sampling march.

      • “time to flaming (s): 29.63”

        FLAMITS record 9106; sampling april.

    • Primary study Pickett2009: Pickett, B. M., Isackson, C., Wunder, R., Fletcher, T. H., Butler, B. W., & Weise, D. R. (2009). Flame interactions and burning characteristics of two live leaf samples1. International Journal of Wildland Fire, 18, 865-874.

      Shared row context: plant part leaves; fuel live; predrying no; device flat flame burner; site Pickett2009-1; sampling june.

      • Shared measurement context: Ignitability measurement.

        • “time to flaming (s): 6.21”

          FLAMITS record 10537.

        • “temperature at flaming (°C): 319”

          FLAMITS record 10557.

        • “time to flaming (s): 0.05”

          FLAMITS record 10567.

        • “time to flaming (s): 6.26”

          FLAMITS record 10577.

        • “time to flaming (s): 6.35”

          FLAMITS record 10578.

        • “temperature at flaming (°C): 293”

          FLAMITS record 10619.

        • “temperature at flaming (°C): 269”

          FLAMITS record 10620.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 10.1”

          FLAMITS record 10547.

        • “flaming duration (s): 13.62”

          FLAMITS record 10598.

        • “flaming duration (s): 9.85”

          FLAMITS record 10599.

    • Primary study Sun2006: Sun, L., Zhou, X., Mahalingam, S., & Weise, D. R. (2006). Comparison of burning characteristics of live and dead chaparral fuels. Combustion and Flame, 144, 349-359.

      Shared row context: Combustibility measurement; plant part twigs; fuel dead; predrying no; device burning bench; site Sun2006-1; sampling spring and fall.

      • “mass loss rate (g/s): 23.19”

        FLAMITS record 12966.

      • “mass loss rate (g/s): 16.03”

        FLAMITS record 12969.

      • “mass loss rate (g/s): 5.49”

        FLAMITS record 12972.

    • Primary study Smith2005: Smith, S. G. (2005). Effects of Moisture on Combustion Characteristics of Live California Chaparral and Utah Foliage. Master dissertations. Brigham Young University - Provo.

      Shared row context: Ignitability measurement; plant part leaves; fuel live; predrying no; device flat flame burner; site Smith2005-1; sampling ND.

      • “temperature at flaming (°C): 231”

        FLAMITS record 16699.

      • “time to flaming (s): 0.69”

        FLAMITS record 16700.

      • “temperature at flaming (°C): 396”

        FLAMITS record 16731.

      • “temperature at flaming (°C): 420”

        FLAMITS record 16732.

      • “temperature at flaming (°C): 462”

        FLAMITS record 16733.

      • “temperature at flaming (°C): 515”

        FLAMITS record 16734.

      • “temperature at flaming (°C): 463”

        FLAMITS record 16735.

      • “temperature at flaming (°C): 496”

        FLAMITS record 16736.

      • “time to flaming (s): 4.99”

        FLAMITS record 16737.

      • “time to flaming (s): 3.19”

        FLAMITS record 16738.

      • “time to flaming (s): 3.28”

        FLAMITS record 16739.

      • “time to flaming (s): 5.62”

        FLAMITS record 16740.

      • “time to flaming (s): 6.7”

        FLAMITS record 16741.

      • “time to flaming (s): 7.11”

        FLAMITS record 16742.

    • Primary study Pickett2010: Pickett, B. M., Isackson, C., Wunder, R., Fletcher, T. H., Butler, B. W., & Weise, D. R. (2010). Experimental measurements during combustion of moist individual foliage samples. International Journal of Wildland Fire, 19, 153-162 .

      Shared row context: Combustibility measurement; plant part twigs; fuel live; predrying no; device flat flame burner; site Pickett2010-1; sampling ND.

      • “mass loss rate (g/s): 0.0089”

        FLAMITS record 18236.

      • “mass loss rate (g/s): 0.0078”

        FLAMITS record 18237.

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Same genus in the directory · the Ceanothus group page

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

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

Ceanothus crassifolius (Ceanothus crassifolius). FireApproved. https://fireapproved.com/plants/ceanothus-crassifolius/. Last verified 2026-08-25.