Observation 1122: Postia caesia group

When: 2006-11-25

Collection location: Sanctuary Forest, near Whitethorn, Humboldt Co., California, USA [Click for map]

Who: Nathan Wilson (nathan)

No specimen available

I did not take a spore print, but if you assume it has the correct spore color (blue or bluish-gray) then it keys out in Mushrooms Demystified as Tyromyces caesius. This name is synonymized with Postia caesius in the Index Fungorum. Oligoporus caesius is also listed as a synonym.

This observation
has a photo of what I believe to be the same species.

N 40d 00m
W 123d 55m
Elevation 1000’-1100’

The specimen was collected as part of a class I taught for the Sanctuary Forest. Overall it was very poor collecting in the Briceland area this year. I believe the reason was an early cold snap which shutdown most of the mycorhizal species. This list are species that were actually found in the Sanctuary Forest. There is a separate list for specimens that were brought to the class for identification.

Species Lists

Proposed Names

84% (1)
Recognized by sight: P caesia doesn’t occur in NA. There are 24 species in the complex of which 7 are documented from NA.
Used references: Miettinen et al. 2018

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= Observer’s choice
= Current consensus


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