Observation 17467: Pluteus similis E. Horak
When: 2009-01-27
Herbarium specimen reported

Notes: An interesting Pluteus species with lamella showing a dark margin, found on decomposed logs mainly in autumn.

Images

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Copyright © 2009 Michael
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Copyright © 2009 Michael
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Scale divisions= 2.5 microns.
Spores.
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Scale divisions= 2.5 microns.
Spores. Attached to basidia.
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Pleurocystidium.
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Pleurocystidium.
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Pleurocystidium.
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Pleurocystidium.
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Pleurocystidium.
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Copyright © 2009 Michael
Pleurocystidium.
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Pleurocystidium.
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Pleurocystidium.
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Pleurocystidium, showing ornamentation at the apex.
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Pigmented sterile cells found on the gill edge. Cheilocystidia.
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Pigmented sterile cells found on the gill edge. Cheilocystidia.

Proposed Names

91% (2)
Eye3 Eyes3
Used references: The Fungi of New Zealand Volume 5, Agaricales of New Zealand 1 Pluteaceae-Entolomataceae E. Horak

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks,
By: Michael W (Michael Wallace)
2011-01-29 19:59:02 PST (-0800)

A few things,
It looks as though P. atromarginatus has a radially fibrillose pileus whereas P. similis has more of a velutinous or granular-punctate surface, the pileipellis structure is probably quite different.
In P. similis the base of the stipe is covered in squamulose fibrils or flaky scales and is distinctly bulbous, it looks as though P. atromarginatus lacks any scales at the base of the stipe and is not distinctly bulbous just slightly enlarged.

The etymology of the species name similis refers to it’s similarity to other Pluteus species.

E. Horak compares this species with P. spegazzinianus which is known from southern Chile and Argentina and says they share several macroscopic and microscopic characters!

I don’t have access to the published description for P. atromarginatus, if anyone could link me to this I will do a more thorough comparison.

beautiful and well documented
By: Danny Newman (myxomop)
2011-01-29 18:17:18 PST (-0800)

just out of curiosity, how does this differ from P. atromarginatus?

Very cool!
By: Matt Sherman (Shermanii)
2011-01-29 17:18:35 PST (-0800)

Neat find and nice microscopy!

beautiful! not just marginate gills, but matching cap texture and gill edges!
By: Debbie Viess (amanitarita)
2009-01-27 07:32:21 PST (-0800)

Created: 2009-01-27 01:13:21 PST (-0800)
Last modified: 2011-01-29 21:48:43 PST (-0800)
Viewed: 163 times, last viewed: 2016-10-27 04:51:05 PDT (-0700)
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