Observation 17486: Pluteus Fr.

Cap extensively striate, strongly hygrophanous, with medium-brown, fine granular scales at center.
Growth on downed Quercus wood.

Spores: 7.7 × 6.3 μm, subglobose, smooth, thick? walled, some staining weakly pinkish in phloxine. Copious in mount.
Lamellar cystidia ~ ventricose-rostrate, entirely strongly pink in phloxine.
Pileipellis a trichodermium.

Specimen in Gilbert Lab Herbarium at UCSC.


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Pilepellis in Congo Red, phloxine, cleared with 3% KOH.
Copyright © 2009 Christian F. Schwarz
Lamellar cystidia in Congo Red, phloxine, cleared with 3% KOH.
Copyright © 2009 Christian F. Schwarz
Spores at 1000×.

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight
52% (1)
Recognized by sight
Based on microscopic features

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
if you want to track down a name for this…
By: Debbie Viess (amanitarita)
2009-01-29 10:04:27 EST (-0500)

I’d suggest bringing your dessicata to ACCF. Else has been diving into the Pluteus, and I’d be glad to get her this specimen.

Nice. That’s how it should be done.
By: Dimitar Bojantchev (dimitar)
2009-01-29 03:29:32 EST (-0500)

Nice photos. Glad to see it done right, at last…

The keys and publications shown by Mike and Darvin are the best
available, but far from satisfactory for California. But that’s all
there is, so…

Also add: Breitenbach & Kraenzlin, Fungi of Switzerland Vol IV, p. 118 -

Your Pluteus looks like one I collected the other day on a fallen
hardwood (probably Quercus) and based on the cystidia shape -
critical, see – I placed it right in the cluster of Pluteus
ephebeus. Of course, whether that name is relevant for California is
an open question, but that’s how far I reached after a brief research.

Else Vellinga should be able to shed more light perhaps, as she wrote
the section on Pluteus in Flora Agaricina N. (FAN).

If you search Pluteus on Google be aware that an amazing number of
yahoos are putting names on them, so discard most of what you see and
only stick to the stuff that seems serious.

Pluteus keys and descriptions
By: Michael Wood (mykoweb)
2009-01-28 23:59:28 EST (-0500)

Banerjee, P. & Sundberg, W.J. (1995). The Genus Pluteus Section Pluteus (Pluteaceae, Agaricales) in the Midwestern United States. Mycotaxon 53: 189-246.

Bas, C., Kyper, T.W., Noordeloos, M.E. & Vellinga, E.C. (1990). Flora Agaricina Neerlandica — Critical monographs on the families of agarics and boleti occuring in the Netherlands. Volume 2. Pluteaceae, Tricholomataceae. A. A. Balkema: Rotterdam, Netherlands. 137 p.

Homola, R.L. (1972). Section Celluloderma of the Genus Pluteus in North America. Mycologia 64(6): 1211-1247.

Orton, P.D. (1986). British Fungus Flora: Agarics and Boleti. Vol 4. Pluteaceae: Pluteus & Volvariella. Royal Botanic Garden: Edinburgh, Scotland. 99 p.

Singer, R. (1956). Contributions Towards a Monograph of the Genus Pluteus. Trans. Br. Mycol. Soc. 39(2): 145-232.

Smith, A.H. & Stuntz, D.E. (1958). Studies on the genus Pluteus I. Redescriptions of American species based on a study of type speciemens. Lloydia 21(3): 115-136.

Good key and excellent descriptions
By: Darvin DeShazer (darv)
2009-01-28 23:41:27 EST (-0500)

Bas, C., TH. W. Kuyper, M. E. Noordeloos and E. C. Vellinga. 1990. Flora Agaricina Neerlandica: Critical Monographs on Families of Agarics and Boleti Occurring in the Netherlands. Volume 2: Pleurotaceae, Pluteaceae, Tricholomataceae (1). A. A. Balkema, Rotterdam, Netherlands. 137p.

By: Christian (Christian Schwarz)
2009-01-28 22:51:43 EST (-0500)

Does anyone know of a good key to Pluteus? This collection seems identifiable.

Created: 2009-01-28 12:09:48 EST (-0500)
Last modified: 2009-01-28 12:09:48 EST (-0500)
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