Observation 180021: Pluteus leucoborealis Justo, E.F. Malysheva, Bulyonk. & Minnis

When: 2014-08-27

Collection location: Kenai Peninsula, Alaska, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

I will drop this off to UCB on Thursday, if Else wants to look at it.


note roughened yellowing stipe and yellow context in base.
note roughened yellowing stipe and yellow context in base.
note roughened yellowing stipe and yellow context in base.
note roughened yellowing stipe and yellow context in base.
abundant horned cystidia on gill faces.
spores at 400×.
spores in water, 1000×.

Proposed Names

57% (1)
Recognized by sight: very interesting Pluteus! staining yellow on stem surface, yellow context, very interesting texture to cap.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
micrographs added.
By: Debbie Viess (amanitarita)
2014-09-26 21:54:16 UTC (+0000)

spores large, almost squared/rectangular in shape, 8 × 5 microns.

pleurocystidia abundant, horned, in Congo Red.

Specimen dropped off w/Else at UCB yesterday.

thanks Ron.
By: Debbie Viess (amanitarita)
2014-09-25 15:56:02 UTC (+0000)

I finally found it once I opened that paper in a more easily readable form.

The macro does mention that yellow base, and the micro is a good match, too. Nice to have my Pluteus ID question, for a new to me species, answered so quickly!

Timing is all. ;)

The description of Pluteus leucoborealis
By: Ron Pastorino (Ronpast)
2014-09-25 01:46:42 UTC (+0000)

is on pages 58-60 of the new Phytotaxa 180 publication.

By: Debbie Viess (amanitarita)
2014-09-24 19:02:17 UTC (+0000)

in a quick read through your paper (forwarded to me by my hubby), that was the name that popped out to me, too! I couldn’t find a macro description, though. I can also throw it under the scope, but would gladly pass it along to Else if she’d like it. Not mutually exclusive things!

cap surface
By: Alfredo Justo (Fredo)
2014-09-24 18:52:06 UTC (+0000)

the pale colors and the aspect of the cap surface remind me of Pluteus leucoborealis, one of the new species that we just described, but without habitat or microscopical data it is just a guess.

If Else or somebody else can scope and it really is P. leucoborealis it should be relatively easy to ID

it was not collected by me …
By: Debbie Viess (amanitarita)
2014-09-24 18:34:30 UTC (+0000)

just pulled out of the fungal heap due to it being interesting. so … could have been growing on anything, really.

cool photos!
By: Alfredo Justo (Fredo)
2014-09-24 17:35:31 UTC (+0000)

Debbie, do you remember what kind of wood/remnants was this growing on?

Created: 2014-09-24 17:06:43 UTC (+0000)
Last modified: 2014-09-26 21:46:48 UTC (+0000)
Viewed: 147 times, last viewed: 2018-01-15 02:40:44 UTC (+0000)
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