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

Aureoboletus mirabilis (Murrill) Halling

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Scientific name
Aureoboletus mirabilis
(Murrill) Halling
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Noah Siegel
Comments etc.
Noah Siegel

Assessment Notes

Taxonomic notes

Described as Ceriomyces mirabilis, then soon after transferred into Boletus (Murrill 1912). It has also been placed in the genera Boletellus and Xerocomus.

Based on phylogenetic data, this species was transferred into the genus Aureoboletus (Halling et al. 2015).

Synonyms: Ceriomyces mirabilis Murrill; Boletus mirabilis (Murrill) Murrill;  Boletellus mirabilis (Murr.) Singer; Heimioporus mirabilis (Murrill) E. Horak; Xerocomus mirabilis (Murr.) Singer

Why suggested for a Global Red List Assessment?

Aureoboletus mirabilis is a common bolete in western North America, roughly occurring in the range of its ectomycorrhizal partner, Tsuga heterophylla.
Population is widespread, and no decline has been observed. We recommend it should be listed as Least Concern (LC).

Geographic range

On the coast, it occurs from Sonoma County in northern California, USA, north into South-central Alaska. In the mountains, it occurs from the southern Cascade Range in Oregon, north into British Columbia, Canada, and east into the Rocky Mountains of Montana.

Population and Trends

Population is widespread, and shows no sign of decline.

Population Trend: Stable

Habitat and Ecology

Ectomycorrhizal with hemlock (Tsuga heterophylla and occasionally T. mertensiana) in young to mature forests in western North America. Typically fruiting from well decayed, moss-covered coarse woody debris.


None identified.

Conservation Actions

None needed.

Research needed

Use and Trade

This species is edible, and occasionally collected for food.

Food - human


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

Halling, R.E., Fechner, N., Nuhn, M., Osmundson, T., Soytong, K., Arora, D., Binder, M. and Hibbett, D. 2015. Evolutionary relationships of Heimioporus and Boletellus (Boletales), with an emphasis on Australian taxa including new species and new combinations in Aureoboletus, Hemileccinum and Xerocomus. Australian Systematic Botany 28(1): 1-22.

Murrill, W.A. 1912. Polyporaceae and Boletaceae of the Pacific Coast. Mycologia 4(2): 91-100.

iNaturalist. 2020. http://www.inaturalist.org

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

Wood, M.G. and Stevens, F.A. 2020. MykoWeb; California Fungi. https://www.mykoweb.com/CAF/species/Aureoboletus_mirabilis.html

Country occurrence

Regional Population and Trends

Country Trend Redlisted