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
Current cited native range in AK, CO, MT, NM, OR, UT, WA, WY.
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.
Form
shrub
Current cited native range
AK, CO, MT, NM, OR, UT, WA, WY
Region
Canada
Rated in
Global
Family
Salicaceae
Evidence
2 cited sources
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.
2 cited rows from this source; its identity, lineage and tier are stated once.
“calorific value (kcal/kg): 5010”
· score 5010 (FLAMITS — calorific value (kcal/kg))
FLAMITS record 12980; Combustibility measurement; plant part stems; fuel dead; predrying no; device calorimeter; site Sylvester1981-1; sampling july to august. Primary study Sylvester1981: Sylvester, T. W., & Wein, R. W. (1981). Fuel characteristics of arctic plant-species and simulated plant community flammability by Rothermels model. Canadian Journal of Botany-Revue Canadienne De Botanique, 59, 898-907.
“calorific value (kcal/kg): 4690”
· score 4690 (FLAMITS — calorific value (kcal/kg))
FLAMITS record 12989; Combustibility measurement; plant part leaves; fuel live; predrying no; device calorimeter; site Sylvester1981-1; sampling july to august. Primary study Sylvester1981: Sylvester, T. W., & Wein, R. W. (1981). Fuel characteristics of arctic plant-species and simulated plant community flammability by Rothermels model. Canadian Journal of Botany-Revue Canadienne De Botanique, 59, 898-907.