Observation 93114: Cortinarius subgenus Dermocybe (Fr.) Fr.

These were growing under mixed conifers @ ~ 4000 ft.
They were small, with caps 2.0 cm across or less.
I wasn’t able to get a spore print but the spores were rather boletinoid, measuring ~ 7.9-11.0 × 4.0-5.0 microns. Q(ave.) = 2.08
They were sl. rough.
KOH on the cap was a dark reddish brown.
Cortinarius(Dermocybe) aureifoilius was the only species that I could find with this characteristic but not much reference material available to compare.
Cortinarius aureifolius var. hesperius Ammirati is another possibility.
Had a communication with Brandon Matheny in which he gave me more detailed information on C. aureifolius. He did not think these were that species because of the location(primarily eastern US) and the spore size. The C. aureifolius has slightly longer spores and thinner, ~ 3.5 microns vs 4.5 microns for these, which raises the Q value significantly.
I saw a communication with Joe Ammirati on Mushroom Talk in which he says that var. hesperius was found on sandy soil in the Cascades and has orange-cinnamon gills vs yellow gills for the C. aureifolius. Also, var. hesperius is listed on the SFSU Spring Fungi list, but no specific sightings.
I’d have a little more confidence if I could find a detailed description for this species.
Further checks by Dimitar Bojantchev confirms that these are not C. aureifolius and are most likely an unnamed species.

Proposed Names

29% (1)
Used references: Limited web sources

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Christian (Christian Schwarz)
2012-04-29 20:54:54 CDT (-0400)

Really interesting spores!

Created: 2012-04-21 19:24:28 CDT (-0400)
Last modified: 2018-04-26 22:53:49 CDT (-0400)
Viewed: 156 times, last viewed: 2018-04-29 20:44:32 CDT (-0400)
Show Log