Observation 63421: Flammulaster rhombosporus (G.F. Atk.) Watling

When: 2010-02-01

Collection location: Menlo Park, California, USA [Click for map]

Who: Douglas Smith (douglas)

Specimen available

Found in grass and duff with small woody debris under live oak.

Granular surface on cap and stipe. Granules stop at upper stipe, in perhaps a velar ring, and finely prunose with cystidia above this.

The first micro-shot is of the cap surface at 400x in Meltzer’s. It is celular, with thin walled globose cells, no gelatin, no pileocystidia.

The second micro-shot is of the gill edge at 400x in Meltzer’s. The cystidia are fusoid-ventricose to lageniform, thin walled, with acute apecies. No pleurocystidia obs., 4-spored basidia. No reactions in spores or tissues to the reagents.

The third micro-shot is of spores from the gill at 1000x in Meltzer’s. The spores are thin-walled, ellipsoid, rather pointed, no germ pore, somewhat angular. Spores apr. 8.5 × 5.5 um on ave.

This is an example of a somewhat common species in California, or at least it seem more common the past couple years, I saw it a few times this past trip to California. I’ve been calling it that unknown Tubaria. I knew I had looked at it under the scope before, but didn’t really get anywhere with it, and giving the amount of good info on Tubaria, not sure it would go anywhere. But the cap is cellular, and if you say it is a Flammulaster because of that, then check in Funga Nordica at least, you can get somewhere, kinda. These look fairly good for F. rhombosporus, with the somewhat angular, pointed spores. There is some info on this one the web from others:


Which doesn’t look completely bad…

There have been other similar obs. recently on this:


And there might be more out there, as unknown or Tubaria sp…



Proposed Names

86% (1)
Eye3 Eyes3
Recognized by sight
Used references: Funga Nordica, web pages.
Based on microscopic features: As described in text.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2011-02-10 16:15:09 GMT (+0000)
Last modified: 2011-02-10 16:30:14 GMT (+0000)
Viewed: 74 times, last viewed: 2018-08-13 00:44:38 BST (+0100)
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