Assessment Notes

Justification

Kuehneromyces mutabilis is a widespread, edible, wood-inhabiting fungus, widely distributed in northern Europe and Asia, and North America. There is no evidence of decline. It can be locally abundant where suitable habitat exists. Therefore, it is assessed as Least Concern (LC).

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Geographic range

Kuehneromyces mutabilis is common and widely distributed throughout Europe, common in parts of North America and occurs in Russian parts of Asia, Japan and in Australia. The area of occupancy (AOO) of this species is much larger than 2,000 km², and its extent of occurrence (EOO) is much larger than 20,000 km².

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Population and Trends

The population size is likely to be very large since this is such a widespread species, and more or less stable as there is no indication of any decline.

Population Trend: Stable

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Habitat and Ecology

Kuehneromyces mutabilis is a wood-inhabiting fungus normally growing in tufts, on stumps, felled trunks and logs of broad-leaf trees, particularly birch, more rarely on coniferous wood.

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Threats

There are no major threats to this species.

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Use and Trade

Kuehneromyces mutabilis is a fairly good edible mushroom. Only experienced fungi foragers should consider gathering this species, because it can be confused with the poisonous Funeral Bell, Galerina marginata.

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Source and Citation

Dahlberg, A. 2019. Kuehneromyces mutabilis (errata version published in 2022). The IUCN Red List of Threatened Species 2019: e.T122090579A223015247. Accessed on 21 November 2025.

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• Country occurrence