Collection location: near Diamond and Crater Lakes, Douglas and Klamath Cos., Oregon, USA [Click for map]
Rather small mushroon; rather large spores.
Measured ~ 14.4-17.5(18.0) X 8.0-9.7(11.2) microns.
Caps were 4.0 cm or less across, and while they were only somewhat tacky in the dry conditions, I’m assuming they belong in the Myxacium group
KOH on the cap was brown and the rest of the surfaces seemed to yield a minimal reaction.
The spores appeared to be a little too broad for C. collinitus but maybe something related?
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You’re correct. These belong in the true Myxacium group, as we understand it currently. I am very sure these are Section Defibulati — one thing you can check – these have no clamps on the cap hyphae. So, they are a mix between our C. vanduzerensis and the classic Swedish C. elatior (lividoochraceus) and they are very close molecularly. These guys have significantly broader spores than the regular large Myxaciums. Now, some folks bunch them with the true Mixaciums like T. collinitus and T. trivialis, but I have at least one phylogenetic interpretation that shows them quite separated with these guys very close to the classic C. violaceus. But this needs more investigation to be discussed.D.