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Lactarius pallescens Hesler & A.H. Sm.

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Scientific name
Lactarius pallescens
Hesler & A.H. Sm.
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Assessment date
IUCN Red List Category
Siegel, N.
Mueller, G.M.

Assessment Notes

The content on this page is fetched from The IUCN Red List of Threatened Species: https://www.iucnredlist.org/species/195922509/195926390


Lactarius pallescens is a locally common milk cap which occurs over a wide area, in association with both conifers and hardwoods in western North America. The population is widespread, and no decline has been observed. It is listed as Least Concern (LC).

Taxonomic notes

It was described based on an Idaho, USA, type collection (Hesler and Smith 1979). The name Lactarius uvidius has been misapplied to this species in western North America, and it is occasionally confused with L. californiensis, a similar species with a darker cap (when young) and smaller spores. The Alaskan Lactarius pallescens var. palmerensis (Hesler and Smith 1979) is likely a distinct species, and is not included in this assessment. Reports on Mushroom Observer and MyCoPortal (2021) from eastern North America appear to be misidentifications.

Geographic range

This species occurs from northern California in coastal forests, throughout the Pacific Northwest in coastal, Coast Range and Cascade forests, east into the Rocky Mountains, and north into central British Columbia, Canada, and possibly into Alaska.

Population and Trends

The population is widespread, and locally quite common. The population appears to be stable, with no decline having been noted.

Population Trend: stable

Habitat and Ecology

It is ectomycorrhizal with a wide number of both conifers and hardwoods. In the southern portions of its range, it has been found with oaks (Quercus spp), but more often with conifers, especially with hemlock (Tsuga spp.) and fir (Abies spp.). Locally common, its fruiting occurs in fall.


No specific threats have been identified with regards to this species.

Conservation Actions

No specific conservation actions are needed with regards to this species. There is a need to investigate the identity of 'fringe' subpopulations that have been attributed to this species (i.e. California oak-associated collections, Alaska collections) with modern taxonomic tools.

Use and Trade

No use/trade is known.

Source and Citation

Siegel, N. 2021. Lactarius pallescens. The IUCN Red List of Threatened Species 2021: e.T195922509A195926390. https://dx.doi.org/10.2305/IUCN.UK.2021-2.RLTS.T195922509A195926390.en .Downloaded on 26 September 2021

Country occurrence