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Boletus subalpinus (Trappe & Thiers) Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett

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Scientific name
Boletus subalpinus
Author
(Trappe & Thiers) Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Boletales
Family
Boletaceae
Assessment status
Published
Assessment date
2018-11-01
IUCN Red List Category
LC
Assessors
Siegel, N.
Reviewers
Castellano, M.

Assessment Notes

The content on this page is fetched from The IUCN Red List of Threatened Species: https://www.iucnredlist.org/species/138329487/138330321

Justification

Gastroboletus subalpinus is a strange looking gastroid boletes with a persistent skin covering the pores. It is an ectomycorrhizal fungus associated with conifers in young to old high elevation forests and widely distributed in such habitats in in the Sierra Nevada and Cascade Ranges in western North America. There is no evidence of decline. It can be locally abundant where suitable forest habitat exists. Therefore, it is assessed as Least Concern (LC).

Taxonomic notes

Described by Trappe and Thiers (1969), from a collection made near Mount Hood in Oregon, USA. This species was previously assigned to the genus Gastroboletus, but this was paraphyletic, accommodating species from a number of genus-level lineages with semi-sequestrate to sequestrate fruitbodies. Genetic studies by Nuhn et al. (2013) indicated a close affiliation between Gastroboletus subalpinus and the genus Boletus; hence the recombination into Boletus.

Geographic range

Known from mid to high elevation fir (Abies spp.) forests in western North American mountains. Common in the Sierra Nevada and southern Cascade mountains in California and Oregon, rare in Washington.

Population and Trends

Currently known from 80 locations, over a wide area in the Sierra Nevada and Cascade mountains in western North America. It is listed as an S1 species in the state of Washington, USA, (Washington Natural Heritage Program List) and is included on the Pacific Northwest Forest Plan (Castellano 1999) as a Survey and Manage species.

Population Trend: stable


Habitat and Ecology

Fruit bodies variable, completely buried to partially exposed in duff under conifers; rarely entirely exposed above duff layer. Ectomycorrhizal, probably associated with White Fir (Abies concolor) and Red Fir (Abies magnifica), and possibly other members of Pinaceae. It occurs in young to mature high elevation Abies forests; especially in Sierra Mixed Conifer, and Red Fir forests in California, and in slightly drier montane and Cascade eastern slope forests in Oregon and Washington.

Threats

There are no major threats to this species. It occurs in young to mature Abies forest, with a large geographic distribution.

Use and Trade

Although this is an edible species, it is rarely collected for food.

Source and Citation

Siegel, N. 2019. Boletus subalpinus. The IUCN Red List of Threatened Species 2019: e.T138329487A138330321. https://dx.doi.org/10.2305/IUCN.UK.2019-1.RLTS.T138329487A138330321.en .Downloaded on 31 January 2021

Country occurrence