Assessment Notes

Justification

Lactarius kauffmanii is a common milk cap, occurring in hemlock and fir forests across western North America. The species is widespread, and no decline has been observed. It is listed as Least Concern (LC).

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Taxonomic notes

It was described by Hesler and Smith (1979) based on a type collection from Idaho, USA.

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Geographic range

This species is widespread in western North America from the northern California coast and Cascade Range, through the Pacific Northwest. It also occurs east into the Rocky Mountains, and north into British Columbia, and south-east Alaska on the coast.

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Population and Trends

Lactarius kauffmanii is a common species with a widespread population, occurring in young to mature hemlock (Tsuga spp.) and fir (Abies spp.) forests. No decline has been observed.

Population Trend: stable

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Habitat and Ecology

It is ectomycorrhizal with fir (Abies spp.), hemlock (Tsuga spp.) and possibly other conifers. It is common in fall, in young to mature forests across northern California and the Pacific Northwest.

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Threats

No threats have been identified with regards to this species.

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Conservation Actions

No specific conservation actions are needed with regards to this species. There is some variation with morphology of this species, and modern taxonomic work and genetic sequencing to delimit species boundaries would be useful.

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Use and Trade

No use/trade is known.

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Source and Citation

Siegel, N. 2021. Lactarius kauffmanii. The IUCN Red List of Threatened Species 2021: e.T195922518A195926588. https://dx.doi.org/10.2305/IUCN.UK.2021-2.RLTS.T195922518A195926588.en .Downloaded on 27 September 2021

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• Country occurrence