Observation 85357: Cortinarius thiersii Ammirati & A.H. Smith

Caps up to 3.7 cm across.
Spores ~ 8.0-9.1 X 5.9-6.1 microns, and moderately rough.
No strong odor detected.
KOH on cap and stem was reddish brown.

Proposed Names

61% (2)
Eye3 Eyes3
Used references: By semi-popular demand. The spores do seem to have the right size and amount of ornamentation(Mycotaxon 5(2) 389-391).

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Like C. thiersii
By: Emma Harrower (eharrower)
2014-03-16 12:43:48 CDT (-0500)

I’ve seen C. thiersii in the spring in Washington State near the snow line. The spore measurements fit this species. My notes for C. thiersii say: “KOH reactions: granular yellow to purplish red extra cellular pigments, depending on age of dried specimen”.

They do look something like C. thiersii
By: Ron Pastorino (Ronpast)
2011-12-31 00:22:08 CST (-0600)

although the caps were a little more darker reddish brown than the photos show.
Also, the C. thiersii is normally found in the Sierras during the spring.

It reminds
By: Irene Andersson (irenea)
2011-12-30 14:25:12 CST (-0600)

quite a bit of Cortinarius thiersii (Dermocybe)

Created: 2011-12-30 11:14:17 CST (-0600)
Last modified: 2014-03-16 15:54:31 CDT (-0500)
Viewed: 109 times, last viewed: 2018-05-10 22:45:15 CDT (-0500)
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