Fauna
Fungus

Western Panther

Amanita pantherinoides

Also known as Western American False Panther, Pacific Panther Amanita

Western panthers emerge along Pacific Northwest forest floors in autumn, forming vital mycorrhizal partnerships with conifers and hardwoods such as Douglas fir and Garry oak. The caps display a distinctive pale yellowish-buff to ochre-tan surface sprinkled with cottony white volval patches and lined with faint marginal striations. Below the cap, pure white free gills release pale spores into the damp understory air before winter rains fully set in.

ToxicForest FloorMycorrhizal
Western Panther reference1 / 7
(c) Alan Rockefeller, some rights reserved (CC BY), uploaded by Alan Rockefeller · cc-by
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyMycorrhizal partner (absorbs nutrients through symbiotic tree root networks)
Predators
  • Fungus gnats
  • Banana slugs
  • Springtails
ThreatsHabitat destruction and soil compaction from logging or heavy development
HabitatsConiferous and mixed forests along the Pacific Coast
Life spanEphemeral fruiting body (lasting 5–12 days); underground mycelium lives for decades
Classification
  1. OrderAgaricales
  2. FamilyAmanitaceae
  3. GenusAmanita
  4. SpeciesAmanita pantherinoides
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Contains potent neurotoxins. Many edible mushrooms have toxic look-alikes; never eat wild fungi based on app identification alone.
Why it is dangerous
Contains ibotenic acid and muscimol, which act on central nervous system receptors causing confusion, muscle spasms, dizziness, and delirium.
How to recognize a risky encounter
Look for a tan-yellowish cap adorned with white warts, free gills, and a distinct ring on the stem above a collar-like volval cup.
What to do
Never consume any part of this fungus, and supervise curious pets and children around fruiting bodies.
Responsible observation
  • Visual Observation: Admire cap scales and stem details without disturbance.
  • Spore Prints: Collect a mature cap on dark paper to reveal white spores.
  • Foraging Safety: Wash hands after handling and keep away from foraging baskets.
Related species
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