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Sticky snakeroot's measured leaf ignition time does not establish that it is fire resistant.
Live sticky snakeroot leaves took 13.16 seconds to begin flaming in a muffle furnace test reported in Dryad's FLAMITS database; they had not been dried beforehand.
The distinction matters because an ignition time needs a basis for interpretation before it becomes a planting recommendation. FLAMITS retains each observation's test conditions. It sets no universal rating threshold across different kinds of flammability measurements. The seconds therefore cannot simply be translated into a resistant or flammable rating. They describe the onset of flaming in the tested leaves; they do not measure how a whole shrub would behave during a garden fire.
Sticky snakeroot, Ageratina adenophora, is a shrub in the Asteraceae family, introduced in California and Hawaii. It is also flagged as invasive in three jurisdictions. That status deserves separate consideration in a planting decision, and the leaf ignition result offers no reassurance that would resolve either concern.
Form
shrub
Rated in
Global
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
Fire-performance conditions
Fire ecology context
Placement evidence
Evidence regions
Global
Maintenance
2. Why this plant is relevant here
State distribution
Documented in CA, HI.
Native range
Introduced / established
2 sourced range or established records. This is not an invasive warning.
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
2 legal-list records; the Place chip matches exact scope.
Seed-list status
2 state noxious-weed seed records; the Place chip matches exact scope.
Reported invasive here
2 ecological invasive reports.
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.
Listed without a rating (8)Corroboration (8 rows from 1 source)
8 cited rows from this source; its identity, lineage and tier are stated once.
“time to flaming (s): 13.16”
FLAMITS record 9655; Ignitability measurement; plant part leaves; fuel live; predrying no; device muffle furnace; site Murray2013-1; sampling march to april. Primary study Murray2013: Murray, B. R., Hardstaff, L. K., & Phillips, M. L. (2013). Differences in leaf flammability, leaf traits and flammability-trait relationships between native and exotic plant species of dry sclerophyll forest. PLoS One, 8, e79205.
Primary study Salvo2015: Salvo-Aires, F. (2015). Effects of woody weeds on fuels and fire behaviour in Eastern Australian forests and woodlands. PhD. Dissertation. University of Sydney.
Shared row context: plant part leaves; fuel live; predrying yes; device calorimeter; site Salvo2015-1; sampling ND.
