• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Amanita calyptroderma G.F. Atk. & V.G. Ballen

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Scientific name
Amanita calyptroderma
G.F. Atk. & V.G. Ballen
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Noah Siegel
Comments etc.
Noah Siegel

Assessment Notes

Taxonomic notes

Amanita calyptroderma was described from California, USA. The names Amanita calyptrata and A. lanei have also been applied to this species, but due to nomenclature and taxonomic issues, A. calyptroderma is the consensus accepted name (see Desjardin et al. 2015).

The paler, spring fruiting ‘form’ (Thiers 1983, Arora 1986) was described as a distinct species, Amanita vernicoccora (Bojantchev et al. 2011).

Why suggested for a Global Red List Assessment?

Amanita calyptroderma is a very common species in the mixed evergreen forests of northern California, and more occasional into Washington, USA.

Population appears stable; no decline has been recorded. I recommend listing as Least Concern.

Geographic range

Very common from central California into southern Oregon in coastal and Coast Range forests, occasional south to Santa Barbara County, California, the Sierra Nevada foothills, and north into Washington, USA.

Population and Trends

Population is widespread, and it is an abundant species across much of the range. No decline has been recorded.

Population Trend: Stable

Habitat and Ecology

Ectomycorrhizal with both hardwoods and conifers; especially Tanoak (Notholithocarpus densiflorus), Madrone (Arbutus menziesii), Coast Live Oak (Quercus agrifolia), among others. Also noted with Douglas-fir (Pseudotsuga menziesii), especially in the northern portion of the range. Very common in the mixed evergreen forests of northern California, occasional elsewhere, fruiting in fall into early winter.

Temperate Forest


No specific threats have been identified with regards to this species.

Conservation Actions

No specific conservation actions have been identified with regards to this species.

Research needed

No specific research is needed with regards to this species.

Use and Trade

Amanita calyptroderma is edible, and occasionally collected by mushroom foragers.


Arora, D. 1986. Mushrooms Demystified. Ten Speed Press: Berkeley, CA. 959 p.

Atkinson, G. F. 1909. Preliminary notes on some new species of Agaricaceae and Clavaria. Annales Mycologici 7 (4): 365-376.

Desjardin, D.E., Wood, M.G. and Stevens, F.A. 2015. California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.

Siegel, N. and Schwarz, C. 2016. Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.

Thiers, H.D. 1982. The Agaricales (Gilled Fungi) of California. 1. Amanitaceae. Mad River Press: Eureka, CA. 53 p.

Wood, M.G. and Stevens, F.A. 2021. MykoWeb: The Fungi of California. https://www.mykoweb.com/CAF/species/Amanita_calyptroderma.html

Country occurrence

Regional Population and Trends

Country Trend Redlisted