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quackgrass

Elymus repens · Poaceae · all Elymus records · also called Elymus repens · Wikipedia

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Elymus repens has 2 legal-list rows for CO and UT in the regulatory record. Its 12 additional regulatory entries remain under seed-list status.

The only fire-related row is a non-voting calorimeter measurement: 4627.4 kcal/kg for live stems that were predried. It provides no recommend-or-avoid threshold, so the page remains a candidate with limited evidence in the evidence table.

The ecological set covers Alaska, Hawaii, and the lower 48. Range evidence documents introduced occurrences, related plants continues comparison, and the genus page retains taxonomy without transferring those statuses to the measurement.

Form
grass
Region
Canada
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

Introduced / established
46 sourced range or established records. This is not an invasive warning.

3. Legal, ecological, and broader status

Legal-list status
2 legal-list records; the Place chip matches exact scope.
Seed-list status
12 state noxious-weed seed records; the Place chip matches exact scope.
Reported invasive here
3 ecological invasive reports.
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

0

exact source areas

Current introduced

46

exact source areas

Qualified

0

doubtful or extinct source rows

46 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Alaska (AK)
  • Arkansas (AR)
  • Arizona (AZ)
  • California (CA)
  • Colorado (CO)
  • Connecticut (CT)
  • District of Columbia (DC)
  • Delaware (DE)
  • Hawaii (HI)
  • Iowa (IA)
  • Idaho (ID)
  • Illinois (IL)
  • Indiana (IN)
  • Kansas (KS)
  • Kentucky (KY)
  • Massachusetts (MA)
  • Maryland (MD)
  • Maine (ME)
  • Michigan (MI)
  • Minnesota (MN)
  • Missouri (MO)
  • Mississippi (MS)
  • Montana (MT)
  • North Carolina (NC)
  • North Dakota (ND)
  • Nebraska (NE)
  • New Hampshire (NH)
  • New Jersey (NJ)
  • New Mexico (NM)
  • Nevada (NV)
  • New York (NY)
  • Ohio (OH)
  • Oklahoma (OK)
  • Oregon (OR)
  • Pennsylvania (PA)
  • Rhode I. (RI)
  • South Dakota (SD)
  • Tennessee (TN)
  • Texas (TX)
  • Utah (UT)
  • Virginia (VA)
  • Vermont (VT)
  • Washington (WA)
  • Wisconsin (WI)
  • West Virginia (WV)
  • Wyoming (WY)

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 (1)
Corroboration (1 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

    “calorific value (kcal/kg): 4627.4”

    FLAMITS record 4990; Combustibility measurement; plant part stems; fuel live; predrying yes; device calorimeter; site Hogenbirk1995-1; sampling june. Primary study Hogenbirk1995: Hogenbirk, J.C., & Sarrazin-Delay, C.L. (1995). Using fuel characteristics to estimate plant ignitability for fire hazard reduction. Water Air Soil Pollut, 82, 161–170.

Fire-resistant grasss instead

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

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

Elymus repens (Elymus repens). FireApproved. https://fireapproved.com/plants/elymus-repens/. Last verified 2026-08-25.