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green needlegrass

Nassella viridula · Poaceae · all Nassella records · also called Nassella viridula · Wikipedia

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Form
grass
Mature height
~2 ft
Water need
low
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 AZ, CA, CO, IA, ID, IL, KS, MN, MT, ND, NE, NM, NY, SD, UT, WI, WY.
Native range
Current cited native range in AZ, CA, CO, IA, ID, IL, KS, MN, MT, ND, NE, NM, SD, UT, WI, WY.
Introduced / established
1 sourced range or established record. This is not an invasive warning.
USDA hardiness
Documented minimum 3b; no upper limit is documented.

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

16

exact source areas

Current introduced

1

exact source area

Qualified

0

doubtful or extinct source rows

16 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Arizona (AZ)
  • California (CA)
  • Colorado (CO)
  • Iowa (IA)
  • Idaho (ID)
  • Illinois (IL)
  • Kansas (KS)
  • Minnesota (MN)
  • Montana (MT)
  • North Dakota (ND)
  • Nebraska (NE)
  • New Mexico (NM)
  • South Dakota (SD)
  • Utah (UT)
  • Wisconsin (WI)
  • Wyoming (WY)
1 introduced source area · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • New York (NY)

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.

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)
  • FLAMITS: FLAMmability plant traiTS database — Dryad / Global Ecology and Biogeography · Dryad version 9 · original source Corroboration Trait database lineage: meta-aggregator

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

    • Primary study Gao2022: Gao, X., & Schwilk, D. W. (2022). Burn hot or tolerate trees: flammability decreases with shade tolerance in grasses. Oikos, 4, e08930.

      Shared row context: plant part whole plant; fuel live; predrying no; device burning bench; site Gao2022-1; sampling spring 2019.

      • Shared measurement context: Ignitability measurement.

        • “time to flaming (s): 1.63”

          FLAMITS record 15957.

        • “time to flaming (s): 1.966”

          FLAMITS record 15961.

      • Shared measurement context: Sustainability measurement.

        • “flaming duration (s): 39.816”

          FLAMITS record 15958.

        • “smouldering duration (s): 19.904”

          FLAMITS record 15959.

        • “flaming duration (s): 18.386”

          FLAMITS record 15962.

        • “smouldering duration (s): 9.692”

          FLAMITS record 15963.

      • Shared measurement context: Combustibility measurement.

        • “flame height (cm): 60”

          FLAMITS record 15960.

        • “flame height (cm): 37”

          FLAMITS record 15964.

Fire-resistant grasss instead

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

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

Nassella viridula (Nassella viridula). FireApproved. https://fireapproved.com/plants/nassella-viridula/. Last verified 2026-08-25.