Assessment Notes

Justification

Laccaria longipes is found in bogs across the Great Lakes region of the USA and Canada east through northeastern US and southeastern Canada. It grows among moss, usually Sphagnum, under Picea mariana, Larix laricina, and Alnus incana subsp. rugosa, but additional collections and observations from moss associating with other conifers have been reported. It likely forms ectomycorrhizal associations with the resident conifer trees. Given its wide distribution range, it is estimated to have a large population size which appears to be stable and is assessed as Least Concern.

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Geographic range

Laccaria longipes is found among moss, usually Sphagnum, under Picea mariana, Larix laricina and Alnus incana subsp. rugosa but additional collections and observations from moss associating with other conifers have been reported. It is found in bogs across the Great Lakes region of the USA and Canada east through northeastern US and southeastern Canada (Mueller 1992).

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Population and Trends

Searches in MyCoPortal (2024) and iNaturalist (2024) return over 100 records. Given its wide distribution range it is estimated to have a large population size which appears to be stable.

Population Trend: Stable

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Habitat and Ecology

The species is found growing among moss, usually Sphagnum. Most reports are from Black Spruce-Tamarack bogs but there are reports of the species growing in association with Hemlock or other conifers. It likely forms ectomycorrhizal associations with the resident conifer trees.

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Threats

No major threats have been identified.

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Conservation Actions

Additional surveys across the known region of occurrence, and further to the west and north, are needed to ascertain its true distribution and abundance.

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Source and Citation

Mueller, G.M. 2025. Laccaria longipes. The IUCN Red List of Threatened Species 2025: e.T273197191A273245581. Accessed on 20 November 2025.

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• Country occurrence