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  • Under Assessment
  • Preliminary Assessed
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Lactarius aurantiosordidus Nuytinck & S.L. Mill.

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Scientific name
Lactarius aurantiosordidus
Author
Nuytinck & S.L. Mill.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Russulaceae
Assessment status
Assessed
Preliminary Category
LC
Proposed by
Noah Siegel
Assessors
Noah Siegel
Comments etc.
James Westrip

Assessment Notes

Justification

Lactarius aurantiosordidus is a small, dingy colored member of the Lactarius ‘deliciosus’ group, growing with Sitka Spruce on the Pacific Coast from northern California into Alaska.

Because it belongs to a difficult to distinguish complex of species, data to assess trends and total population is lacking, but the widespread occurrence, and local abundance suggest that it should be listed as Least Concern.


Taxonomic notes

This species was described from northern California (Nuytinck et al. 2006).

Some collections appear to have been called Lactarius deliciosus var. olivaceosordidus (Hesler & Smith 1979, Methven 1997).


Why suggested for a Global Red List Assessment?

Lactarius aurantiosordidus is a small, dingy colored member of the Lactarius ‘deliciosus’ group, growing with Sitka Spruce on the Pacific Coast from northern California into Alaska.

Data to assess trends and total population is lacking, but the widespread occurrence, and local abundance suggest that it should be listed as Least Concern.


Geographic range

Known from coastal forests from northern California into southeast Alaska, roughly following the distribution of Sitka Spruce (Picea sitchensis) (iNaturalist 2021, N. Siegel unpublished data).


Population and Trends

Population is widespread; but being a recently described, and hard to identify species, date to assess trends is currently lacking. Locally common to abundant on the far northern California and Oregon coast, and also seen with regularity in Alaska (N. Siegel unpublished data).

Population Trend: Uncertain


Habitat and Ecology

Ectomycorrhizal with Sitka Spruce (Picea sitchensis) in coastal forests. Fruiting in summer in the north, into late fall in the southern portions of its range.

Temperate Forest

Threats

Climate change is affecting Sitka Spruce forests on the southern portion of its range; but probably not at a scale to affect the population overall.

Widespread logging in British Columbia, Canada and southeast Alaska, USA.

Unintentional effects: large scale (species being assessed is not the target) [harvest]Habitat shifting & alteration

Conservation Actions

Protect mature and old growth spruce forests in British Columbia and Alaska. Data to assess trends, and population data across the range of this species.

Site/area protection

Research needed

Data to assess trends, and population data across the range of this species.

Population size, distribution & trends

Use and Trade

This species is edible, but appears to be rarely collected.

Food - human

Bibliography

Hesler, L.R. & 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.

Nuytinck, J., Miller, S.L. and Verbeken, A. 2006. A taxonomical treatment of the North and Central American species in Lactarius sect. Deliciosi. Mycotaxon. 96:261-307

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