Current native
5
exact source areas
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Deergrass
Muhlenbergia rigens
Your local evidence lens
Separate evidence questions, never one approval badge
A genus split is not a placement verdict. Set a ZIP to read the local documented split.
1. Fire evidence and conditions
- Fire evidence
- Highly flammable — location does not change the cited classification.
- Fire-performance conditions
- No test or rating condition is normalized.
- Fire ecology context
- No section-reviewed fire-ecology context is normalized.
- Placement evidence
- 3 source placement records; source schemes remain separate.
- Evidence regions
- Arizona above 3,000 feet / interior Southwest; Austin, Texas; Georgetown, Texas; Yavapai County, Arizona; eastern US
- Maintenance
- No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.
Typed publication scope: 4 scopes across 4 cited fire sources
- Firewise Plant Guide · Official scoped edition
- Firewise Landscaping (Travis County) · Official scoped edition
- FIREWISE Plant Materials for 3,000 ft. and Higher Elevations (AZ1289) · Official scoped edition
- Fire-Resistant and Fire-Prone Plants Common to Yavapai County (Bulletin 34) · Official scoped edition
2. Why this plant is relevant here
- State distribution
- Documented in AZ, CA, NM, NV, TX.
- Native range
- Current cited native range in AZ, CA, NM, NV, TX.
- Introduced / established
- No introduced or established row is normalized; that does not prove native status.
- USDA hardiness
- Documented minimum 9a; no upper limit is documented.
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
- grass
- USDA hardiness
- Minimum 9a; upper limit not documented
- Mature height
- ~4.5 ft
- Water need
- low
- Current cited native range
- AZ, CA, NM, NV, TX
- Grows in
- AZ, CA, NM, NV, TX
- Rated in
- Arizona above 3,000 feet / interior Southwest; Austin, Texas; Georgetown, Texas; Yavapai County, Arizona +1
- Family
- Poaceae
- Evidence
- 5 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.
Current introduced
0
exact source areas
Qualified
0
doubtful or extinct source rows
5 native source areas
- Arizona (AZ)
- California (CA)
- New Mexico (NM)
- Nevada (NV)
- Texas (TX)
Plant hardiness evidence
-
USDA PLANTS Database — Plant Characteristics
Minimum 9a · no upper limit documented
Where its sources say to plant it
- Eastern United States Fire Performance Plant Selector: Master Plant DB row 866
- Firewise Landscaping: Perennials
- Firewise Plant Guide: Ornamental Grasses
The evidence
Recommends (1)
-
FIREWISE Plant Materials for 3,000 ft. and Higher Elevations (AZ1289)
“listed FIREWISE plant material”
Listed among fire-resistant plant materials for Arizona above 3,000 feet.
Avoids (4)
-
Eastern United States Fire Performance Plant Selector
“H”
Living With Fire workbook row 866 attributes this value to FPS.
-
Fire-Resistant and Fire-Prone Plants Common to Yavapai County (Bulletin 34)
“Fire-Prone Plants”
Listed as Deergrass — Muhlenbergia rigens. The bulletin says fire-resistant plants tend to resist ignition when irrigated and maintained, while fire-prone plants may ignite readily and burn intensely.
-
Firewise Landscaping (Travis County)
“Plants to Avoid for Zone 1 (within 30′ of Structure)”
Listed as Muhly, Deer — Muhlenbergia rigens. The page says Zone 1 entries should be restricted to zones 2 or 3; all-zone entries are highly flammable due to volatile oils or growth habit.
-
“high”
The table rates Muhly, Deer — Muhlenbergia rigens high for flammability hazard, defined as the ease a plant can burn at high temperatures for a prolonged time.
