Observation 117806: Flammulaster erinaceellus (Peck) Watling

When: 2012-11-24

Collection location: San Pablo Reservoir, Contra Costa Co., California, USA [Click for map]

Who: Richard Sullivan (enchplant)

No specimen available

These were tiny , with caps less than 1 cm across, height <1cm. growing on a very mushy decayed log under a bay tree by a stream. On adjacent logs lots of Mycenas, Hemimycena, pluteus, galerina.

SPORES: 4-5µm x 7-9µm


Spores at 1000X. spores are 7-9µm x 4-5µm in Meltzer’s .
basidium with spores attached. In KOH with congo red.
granular pileipellis and spores at 100x
Cheilocystidia in 1% phyloxine dye at 1000x
Cheilocystidia in 1% phyloxine dye at 1000x
Cheilocystidia in 1% phyloxine dye at 1000x

Proposed Names

47% (2)
Recognized by sight
-36% (5)
Recognized by sight
-35% (6)
Recognized by sight
52% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
very nice observation
By: Britney Ramsey (Riverdweller)
2012-11-29 12:54:57 CST (-0500)

Enchplant :)

Cystidia shape
By: Irene Andersson (irenea)
2012-11-29 03:15:23 CST (-0500)

points towards erinaceella, rules out muricatus :-)

By: Richard Sullivan (enchplant)
2012-11-29 01:06:12 CST (-0500)

Here is what I have found in terms of cystidia. They are from a crush mount of a single gill and appear in these clusters at the edges in some places. They are in 1% phloxine dye and water.

By: Irene Andersson (irenea)
2012-11-26 09:54:33 CST (-0500)

does the spore colour..
Is it possible to get a photo of cheilocystidia too?
capitate ends in erinaceella-
clubshaped in muricatus-

Spore measurements.
By: Richard Sullivan (enchplant)
2012-11-26 09:41:00 CST (-0500)

don’t seem to match any of the Cystodermas on Mushroomexpert.com

That is really intriguing Britney!
By: Richard Sullivan (enchplant)
2012-11-24 13:57:12 CST (-0500)

I am delighted you suggested Flammulaster. You suggested Flammulaster for another observation a couple of days ago that was located only a few yards away!http://mushroomobserver.org/117139
Not like there have been many observations of Flammulaster on MO from California. So why would there be two in this little spot is beyond me!

Thanks Daniel!
By: Richard Sullivan (enchplant)
2012-11-24 13:41:00 CST (-0500)

I will try keying this out later on and I can get the microscope up and working.
They are super cute. They look like small Galerinas until you see the scaly caps and stipes.

Found this online.
By: Daniel B. Wheeler (Tuberale)
2012-11-24 13:38:39 CST (-0500)
Pretty sure Cystoderma, Richard.
By: Daniel B. Wheeler (Tuberale)
2012-11-24 13:34:57 CST (-0500)

These tiny mushrooms are distinctive with their very scaley caps and stipes, growing from wood, and sometimes are very colorful. I don’t know of any keys, but maybe there’s one online?

Created: 2012-11-24 13:30:26 CST (-0500)
Last modified: 2012-11-29 14:38:51 CST (-0500)
Viewed: 171 times, last viewed: 2018-01-21 10:32:28 CST (-0500)
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