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Glaucus/Sierra larkspur

Delphinium glaucum · Ranunculaceae · all Delphinium records

Your local evidence lens

Separate evidence questions, never one approval badge

Set a ZIP to compare this record with state distribution, native range, USDA hardiness, and invasive records.

A genus split is not a placement verdict. Set a ZIP to read the local documented split.

1. Fire evidence and conditions

Fire evidence
Mixed evidence — 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
2 source placement records; source schemes remain separate.
Evidence regions
Lake Tahoe Basin, Nevada and California; southern Idaho / Intermountain
Maintenance
No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.
Typed publication scope: 2 scopes across 2 cited fire sources
  • Fire Resistance of Plants Master Database · Official scoped edition
    • Southern Idaho (ID footprint); partial normalized coverage · 2013-11-08

      The official database labels itself "For Southern Idaho" and describes Idaho residents at the urban-rangeland interface. FireApproved publishes 419 existing plant owners that cite its scored rows. This bounded Southern Idaho scope is regional context, not statewide coverage or a conclusion that the score transfers unchanged to every Idaho site.

  • Home Landscaping Guide for Lake Tahoe and Vicinity (Ed. Bulletin 06-01) · Official scoped edition
    • Lake Tahoe Basin (CA, NV footprint); partial normalized coverage · 2006-01-01

      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.

2. Why this plant is relevant here

State distribution
Documented in AK, AZ, CA, CO, ID, MT, NV, OR, UT, WA, WY.
Native range
Current cited native range in AK, CA, CO, ID, MT, NV, OR, UT, WA, WY.
Introduced / established
No introduced or established row is normalized; that does not prove native status.
USDA hardiness
Documented minimum 4a; 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
perennial
USDA hardiness
Minimum 4a; upper limit not documented
Mature height
~8 ft
Water need
high
Current cited native range
AK, CA, CO, ID, MT, NV, OR, UT, WA, WY
Grows in
AK, AZ, CA, CO, ID, MT, NV, OR +3
Rated in
Lake Tahoe Basin, Nevada and California; southern Idaho / Intermountain
Family
Ranunculaceae
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.

Current native

10

exact source areas

Current introduced

0

exact source areas

Qualified

0

doubtful or extinct source rows

10 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Alaska (AK)
  • California (CA)
  • Colorado (CO)
  • Idaho (ID)
  • Montana (MT)
  • Nevada (NV)
  • Oregon (OR)
  • Utah (UT)
  • Washington (WA)
  • 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.

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.

Where its sources say to plant it

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.

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.

Recommends (1)

Mid-scale / conditional (1)

Fire-resistant perennials instead

Fireweed
Epilobium angustifolium Wild Blue Flax
Linum lewisii Pearly Everlasting
Anaphalis margaritacea Yellow stonecrop
Sedum lanceolatum Western wallflower
Erysimum capitatum Thimbleberry
Rubus parviflorus
Same genus in the directory · the Delphinium group page

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

Profiles: USDA PLANTS · GBIF ·

Delphinium glaucum (Glaucus/Sierra larkspur). FireApproved. https://fireapproved.com/plants/delphinium-glaucum/. Last verified 2026-08-25.