Observation 17595: Arrhenia epichysium (Pers.) Redhead, Lutzoni, Moncalvo & Vilgalys

When: 2009-01-31

Collection location: Albion, California, USA [Click for map]

Who: Christian (Christian Schwarz)

Specimen available

Microphotographs show long, knobby, tortuous pleurocystidia, sarcodimitic trama, and long, strangulate-stalked basidia.
Inamyloid, broadly elliptical spores 6.5 μm long x 4.5 μm wide, with fairly obvious hilar appendage.

Herbarium specimen is very poor. Gilbert Lab, UCSC.

Species Lists


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Incrusted pileocystidia with abundant clamp connections. (1000x)
Copyright © 2009 Christian F. Schwarz
Long, strangulate basidia.
Copyright © 2009 Christian F. Schwarz
Tortuous cystidia.
Copyright © 2009 Christian F. Schwarz
Lamellar trama – note long, smooth, aseptate skeletal hypha. This indicates a sarcodimitic hyphal system.
Copyright © 2009 Christian F. Schwarz
Spore. Spores were very scarce in the mount.

Proposed Names

85% (1)
Used references: Mykoweb
Based on microscopic features: See description.

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= Observer’s choice
= Current consensus


Add Comment
Better photos here
By: Christian (Christian Schwarz)
2011-05-06 09:20:27 PDT (-0700)
Wow, Christian! Bang-up job on those micrographs!
By: Debbie Viess (amanitarita)
2009-02-04 20:35:59 PST (-0800)

torturous pleurocystidia indeed. and killer clamps! you make it look easy…

Created: 2009-02-04 18:33:28 PST (-0800)
Last modified: 2011-05-06 09:20:27 PDT (-0700)
Viewed: 100 times, last viewed: 2019-01-27 12:56:24 PST (-0800)
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