• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Lactarius xanthogalactus Peck

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Scientific name
Lactarius xanthogalactus
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Noah Siegel
Comments etc.
Noah Siegel

Assessment Notes

Taxonomic notes

Described as Lactarius xanthogalactus, from a collection made at Stanford University (Peck 1907). However, this name was rarely used, and collections of this species were referred to as Lactarius chrysorheus and Lactarius vinaceorufescens (Hesler & Smith 1979, Arora 1986).
Research into California Lactarius (Methven 1997) clarified the taxonomic issues.

Why suggested for a Global Red List Assessment?

Lactarius xanthogalactus is a very common milk cap, occurring in both conifer and hardwood forests across California and Oregon, USA.

Population is widespread, and no decline has been observed. We recommend it should be listed as Least Concern (LC)

Geographic range

Very common across most of the forested low and mid elevations parts of California and southern Oregon, USA, occasional north through Oregon; south into northern Baja California, Mexico.

Population and Trends

Population is widespread, in many different habitat types. Occurring in both conifer and hardwood forests in coastal and low montane forests across California, with no sign of decline.

Population Trend: Stable

Habitat and Ecology

Ectomycorrhizal with hardwoods; especially oaks (Quercus spp.) and Tanoak (Notholithocarpus densiflorus) and conifers, especially Douglas-fir (Pseudotsuga menziesii). Very common, in young to mature forest across California.

Temperate Forest


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

Conservation Actions

No specific conservation actions is needed with regards to this species.

Research needed

No specific research is currently needed in regards to this species.

Use and Trade

None known.


Arora, D. 1986. Mushrooms Demystified. Ten Speed Press: Berkeley, CA. 959 p.

Hesler, L.R. and Smith, A.H. 1979. North American Species of Lactarius. University of Michigan Press: Ann Arbor, MI. 841 p.

iNaturalist. 2021. Available at: http://www.inaturalist.org

Methven, A.S. 1997. The Agaricales (Gilled Fungi) of California. 10. Russulaceae II. Lactarius. Mad River Press: Eureka, CA. 79 p.

Peck, C.H. 1907. New species of fungi. Bull. Torrey Bot. Club 34: 345-349.

Siegel, N. and Schwarz, C. 2016. Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.

Country occurrence

Regional Population and Trends

Country Trend Redlisted