Assessment Notes

Justification

Calocybe gambosa is widespread edible saprobic fungus in western Europe. 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

Calocybe gambosa is distributed throughout Europe, infrequent in most parts, but on calcareous soils it can be locally very common. 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

Calocybe gambosa is a decomposer fungus growing commonly in richer, often calcareous, soils in natural and semi-natural grasslands, meadows, pastures, sometimes also in gardens and deciduous forests. Typically forms fairy rings, which may become huge and be several hundred years old.

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Threats

There are no major threats to this species. It is common and widely distributed in calcareous grasslands.

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Conservation Actions

No conservation measures are needed for this species since it is widespread and there are no major threats to it.

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Use and Trade

Calocybe gambosa is an appreciated and widely collected edible species.

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Source and Citation

Dahlberg, A. 2019. Calocybe gambosa. The IUCN Red List of Threatened Species 2019: e.T122090261A222965313. https://dx.doi.org/10.2305/IUCN.UK.2019-3.RLTS.T122090261A222965313.en .Accessed on 16 February 2025

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• Country occurrence