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

Lactarius subvillosus Hesler & A.H. Sm.

Go to another Suggested Species...

Scientific name
Lactarius subvillosus
Hesler & A.H. Sm.
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Noah Siegel
Comments etc.
Noah Siegel

Assessment Notes

Taxonomic notes

Described based on a California Type collection (Hesler & Smith 1979).

Why suggested for a Global Red List Assessment?

Lactarius subvillosus is an uncommon to locally common species in northern California and Oregon, USA.

Little data is available to assess trends, and southwest collections should be compared genetically with California collections before an assessment is made. Therefore I recommend listing it as Data Deficient (DD)

Geographic range

From Santa Cruz County, California, USA, in coast and Coast Range forest north into northern Oregon, and scattered locations in the Sierra Nevada foothills of California. Also reported from Arizona, New Mexico and Colorado, however collections from these areas should be compared genetically to California collections.

Population and Trends

Population is widespread, but this species is uncommon over much of the range, locally common in Mendocino and Humboldt County, California. Population appears stable, but limited data is available to asses trends.

Population Trend:

Habitat and Ecology

Ectomycorrhizal, occurring in mixed evergreen forests on Northern California and conifer forests in Oregon. Likely associated with Douglas-fir (Pseudotsuga menziesii), fruiting in fall and winter.


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

Genetic sequencing of southwest and Rocky Mountain collections, comparing them with California collections. More data to assess trends.

Use and Trade

None known.


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.

MyCoPortal. 2021. http://mycoportal.org/portal/index.php. Accessed on January 11.

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