Observation 150409: Cystodermella cinnabarina (Alb. & Schwein.) Harmaja

When: 2013-10-25

Collection location: Ozark National Forest, Arkansas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

Identified at the 2013 NAMA Foray.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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thank you, Alfredo…
By: Debbie Viess (amanitarita)
2013-10-31 10:00:24 CDT (-0400)

for that detailed reply.

One of those reddish capped cystodermas did get put under the scope….cause I saw it!
Names were flying over these, and I was curious how and why amianthinum was chosen.

I agree w/cinnabarina, for the cap color alone.

But I figured someone in our talented MO audience could come up with reasons why beyond its pretty face.

The only thing I can add regarding this collection
By: Ron Pastorino (Ronpast)
2013-10-30 19:21:00 CDT (-0400)

is that I dropped it off late on Saturday(The NAMA Foray).
Within 15 minutes it had been Id’d, given a voucher number and was on the display
table. So I doubt that much time was spent doing any microscopy or anything other than a quick visual scan.

spores and cystidia
By: Alfredo Justo (Fredo)
2013-10-30 14:31:46 CDT (-0400)

Cystodermella has non-amyloid spores and Cystoderma (including amianthinum) has amyloid spores, although the reaction can be sometimes difficult to observe.

C. cinnabarina has cystidia in the hymenium (sometimes also on the cap and stipe), usually they are incrusted with crystals at the apex. C. amianthinum has no cystidia

But btw -
By: Douglas Smith (douglas)
2013-10-30 14:29:51 CDT (-0400)

But btw – I also agree, I don’t think these are C. amianthinum either… I’m sooo helpful…

Inamyloid vs amyloid spores
By: Christian (Christian Schwarz)
2013-10-30 14:28:24 CDT (-0400)

for one. I’m sure you can consult references to find others

By: Douglas Smith (douglas)
2013-10-30 14:28:14 CDT (-0400)

Cystodermella vs. Cystoderma has a clear different of amyloid or non-amyloid spores. Except the spores are rather small and smooth, so that is not always clear maybe.

But Cystodermella cinnabarina has really distinct cystidia, lanceolate and lightly incrusted. Cystoderma doesn’t have any cystidia. You can see some cystidia in observation 10731.

If Cystodermella cinnabarina, it should have been rather obvious under the scope.

micro diffs?
By: Debbie Viess (amanitarita)
2013-10-30 14:23:08 CDT (-0400)
Color and stature
By: Christian (Christian Schwarz)
2013-10-30 13:14:35 CDT (-0400)

really ruddy and stocky (compared to dull yellow-beige and more slender usually in C. amianthinum).

I think cap microscopy is similar and distinctive throughout the genus, but definitely not the most useful character for within-genus specific ID.

why not, Irene?
By: Debbie Viess (amanitarita)
2013-10-30 12:40:50 CDT (-0400)

these, or some very similar, were scoped at the foray, and distinctive cells were seen on the pileipellis that apparently confirmed amianthinum.

what indicates cinnabarinum instead?

Cystoderma or Cystodermella
By: Irene Andersson (irenea)
2013-10-30 12:17:02 CDT (-0400)

but not amianthinum

Created: 2013-10-29 23:00:08 CDT (-0400)
Last modified: 2013-10-31 09:53:07 CDT (-0400)
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