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

Lactarius aestivus Nuytinck & Ammirati

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

Assessment Notes

Taxonomic notes

Described from a Type collection made in Washington, USA (Nuytinck & Ammirati 2014).

Older records were called by the European name Lactarius deliciosus; which was applied to a complex of species in North America.

It is a member of Lactarius sect. Deliciosi; which still has a number of underscibed species in western North America.

Why suggested for a Global Red List Assessment?

Lactarius aestivus is a common species in northern California and the Pacific Northwest in fir and hemlock forest.

Population is widespread and stable; it should be listed as Least Concern (LC).

Geographic range

Occurring in western North America, from the northern California Coast and northern Sierra Nevada, north through the Cascade Range, and widespread in coastal and montane forests throughout the Pacific Northwest. Being a recently described species, (Nuytinck & Ammirati 2014), geographical parameters are lacking data; this species likely occurs north into British Columbia, and possibly into southeast Alaska, and east into the Rocky Mountains.

Population and Trends

Lactarius aestivus 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

Habitat and Ecology

Ectomycorrhizal with fir (Abies spp.) and hemlock (Tsuga spp.). Common in late summer and fall in the Pacific Northwest, and fall into winter in California; growing in young to mature forests across northern California and the Pacific Northwest.

Temperate Forest


No threats have been identified with regards to this species.

Conservation Actions

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

Research needed

Continued data regarding range of this species.

Population size, distribution & trends

Use and Trade

This species is edible, and occasionally collected for food.

Food - human


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

Nuytinck, J. and Ammirati, J. 2014. A new species of Lactarius sect. Deliciosi (Russulales, Basidiomycota) from western North America, Botany, 2014, 92(10): 767-774.

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