- Scientific name
- Stropharia ambigua
- (Peck) Zeller
- Common names
- IUCN Specialist Group
- Mushroom, Bracket and Puffball
- Assessment status
- Assessment date
- IUCN Red List Category
- Siegel, N.
- Dahlberg, A.
is an abundant and widespread mushroom in western North America. It is one of the most common mushrooms in the Pacific Northwest, and is listed as Least Concern (LC).
Described from a collection made near Portland, Oregon, USA as Hypholoma ambiguum
(Peck 1898), this species was transferred into Stropharia
(Zeller 1914) where it resides today.
This species ranges from south-central Alaska into southern California, and east into the northern Rocky Mountains. It is occasional in the edges of the range, but very abundant in northern California and the Pacific Northwest. The name Stropharia ambigua
has been applied to records from China and elsewhere outside North America but these are excluded from this assessment pending clarification of their taxonomy.
Population and Trends
This is a widespread and very common species, especially in disturbed and urbanized habitats.
Population Trend: stable
Habitat and Ecology
It is saprotrophic, growing on conifer needle duff and moss, small woody debris, soil or woodchips.
No specific threats have been identified with regards to this species.
No specific conservation action is needed with regards to this species. Taxonomic research is needed on records identified as Stropharia ambigua
from areas outside North America.
Use and Trade
No use/trade is known.
Source and Citation
Siegel, N. 2021. Stropharia ambigua. The IUCN Red List of Threatened Species 2021: e.T198480898A198490328. https://dx.doi.org/10.2305/IUCN.UK.2021-2.RLTS.T198480898A198490328.en
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