Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
The Purshia tridentata file for purshia tridentata joins conflict. On purshia tridentata, Cone calorimeter testing of sits versus that purshia tridentata row. The facts stay as separate jobs on Purshia tridentata. conflict and Cone calorimeter testing stay split for purshia tridentata.
On purshia tridentata, Purshia tridentata also carries Low-volume and slow-burning for purshia tridentata. On purshia tridentata, Purshia tridentata also carries green test condition for purshia tridentata. On purshia tridentata, Purshia tridentata also carries same form alternatives for purshia tridentata.
Use evidence on purshia tridentata for purshia tridentata. Use test conditions on purshia tridentata for purshia tridentata. The jumps stay with purshia tridentata on Purshia tridentata.
Ashland, Oregon; British Columbia; California; Colorado, California, and northeastern United States; Fremont County, Wyoming; Global; Lake Tahoe Basin, Nevada and California; Nevada / Great Basin; New Mexico; Utah / Intermountain West
Maintenance
Typed publication scope: 6 scopes across 6 cited fire sources
City of Ashland (OR footprint); partial normalized coverage · 2026-08-26
This is a City of Ashland adoption fact, not statewide Oregon guidance or an experimental flammability result. FireApproved publishes 24 taxonomy-safe owners as city-level regulatory context. It applies to new planting and propagation within 30 feet of structures, including structures on adjacent lots; it is not projected as a blanket removal order for every established listed plant.
Fremont County (WY footprint); partial normalized coverage · 2011-02-25
The source identifies itself as the Fremont County Firewise Plant List. FireApproved publishes its 92 exact source owners as Fremont County regional context. No methodology, current county endorsement, statewide Wyoming scope, or site-specific suitability is inferred.
New Mexico Forestry Division publishes this as its FireWise Plant List for New Mexico. FireApproved accounts for all 140 printed rows and publishes 95 exact same-rank owners already represented in the directory; 29 exact taxa without an existing record, 14 unresolved spellings or higher-rank matches, one compound taxon cell, and one species row whose only apparent owner has an infraspecific printed identity remain held. Every published row retains the source's Y, N, ?, or blank elevation cells. Publication scope does not erase those elevation limits or establish suitability for every New Mexico site.
Nevada Division of Forestry and University of Nevada Cooperative Extension publish Bulletin 06-01 for the Lake Tahoe Basin and vicinity. FireApproved publishes 83 exact rated owners as basin context across Nevada and California. Rough estimates are not statewide or site ratings.
University of Nevada Cooperative Extension compiled plants suited to Nevada climate zones and reported favorably by at least two upstream firewise lists. FireApproved publishes 126 exact source owners at Nevada publication scope. The source explicitly makes no independent flammability determination, so these rows remain corroborative.
Utah State University Extension states that this fact sheet selects examples for Utah landscapes and that they require proper placement and maintenance. FireApproved publishes 83 exact source owners at Utah publication scope. The table is not a site-specific planting clearance.
2. Why this plant is relevant here
State distribution
Documented in AZ, CA, CO, ID, MT, NE, NM, NV, OR, UT, WA, WY.
Native range
Current cited native range in AZ, CA, CO, ID, MT, NE, NM, NV, OR, UT, WA, WY.
Introduced / established
USDA hardiness
Documented minimum 4a; no upper limit is documented.
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
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.
Plant hardiness evidence
These values describe the plant source. Your ZIP zone comes from the separate 2023 USDA
Plant Hardiness Zone Map. Whole-zone values stay whole-zone, and a single unresolved value
is not treated as a tolerance range. Different source boundaries stay separate: overlapping
statements are compared independently, while only ranges with no shared zone are called a conflict.
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Prohibited Flammable Plants: new planting or propagation restricted within 30 ft of any structure [Ashland Municipal Code setback] (with its avoid rating)
Low-volume and slow-burning vegetation for planting on cl…: Table 5: Plants not considered suitable for use to reduce fire hazards [nord-green-brushland-clearing-performance] (mid-scale rating)
Home Landscaping Guide for Lake Tahoe and Vicinity: Fire Hazard column: high [tahoe-guide-2006] (with its avoid rating)
FireWise Plant List for New Mexico: PDF page 4, Shrubs, p4-r25 [nm-emnrd-firewise-table-row] (with its recommendation)
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.
“Fremont County Firewise Plant List — Purshia tridentata — Antelope Bitterbrush”
Listed in the source's Shrubs section; the page describes its listed Firewise plants as generally low-growing, low-debris, and relatively moist.
FireWise Plant List for New Mexico — New Mexico Energy, Minerals and Natural Resources Department, Forestry Division · 2003 Forestry Division PDF · original sourceCorroborationCompilationlineage: csu-nmsu-firewise
Table 1's Fire Hazard column prints “high” for this taxon. The guide calls the rating a rough estimate of potential flammability, not a result of scientific trials. Its footnote says plants that turn brown often become high fire hazards and tells readers to mow grasses and forbs when they begin to turn brown.
3 cited rows from this source; its identity, lineage and tier are stated once.
Primary study White2002: White, R. H., Weise, D. R., Mackes, K., & Dibble, A. C. (2002). Cone calorimeter testing of vegetation--an update. Ninth International Conference on Electrical and Electronic Products. Columbus, Ohio, USA.
Shared row context: Combustibility measurement; plant part leaves; fuel live; device calorimeter; site White2002-2; sampling ND.
