Observation 29049: Cystolepiota seminuda (Lasch) Bon

When: 2009-11-29

Collection location: Canyon, Contra Costa Co., California, USA [Click for map]

Who: Richard Sullivan (enchplant)

No specimen available

growing in redwood litter


spores at 1000x elliptical smooth, non amyloid, 2-3µm x 4-5µm
More Photos of Spores at 1000x These are really small for every mycena I have looked up. 2-3µm x 4-5µm
More Photos of Spores at 1000x These are really small for every mycena I have looked up. 2-3µm x 4-5µm

Proposed Names

-8% (3)
Recognized by sight: White. Caps < 1cm across.
Based on microscopic features: spores smooth elliptical 2-3µm x 4-5µm non amyloid
-28% (3)
Recognized by sight: Trouble is this was growing in redwood leaf litter not on a cone. There were no other conifers around.
Based on microscopic features: The spores are really small for any Mycena I have looked up. I used Amy Miller’s Key to Mycenoid fungi of the Pacific northwest and Even the Hemimycenas that look like this had bigger spores. The only thing I can find that has spores of this size is Strobilurus.
52% (3)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
although not as obvious as in, say, CureCat’s photos of this one…
By: Debbie Viess (amanitarita)
2009-12-02 11:17:19 CST (-0500)

the ragged cap margin is also apparent in your photos.

Glad to hear
By: Irene Andersson (irenea)
2009-12-02 08:45:00 CST (-0500)

that you agree. And I’m also glad to see someone making real efforts to describe and discuss his finds…

Thank you Irene
By: Richard Sullivan (enchplant)
2009-12-02 07:41:03 CST (-0500)

Thanks so much. This looks like a good match. Next time I see it I want to pay more attention to the cap margin and see if it is ragged.
Great to have someone with your experience to help in a case like this!

Spores are too small
By: Richard Sullivan (enchplant)
2009-12-01 22:15:36 CST (-0500)
Amy Miller’s Key to Mycenas http://www.svims.ca/council/Mycenoid.htm
Who is good with Spores?
By: Richard Sullivan (enchplant)
2009-12-01 22:11:15 CST (-0500)

I am intrigued with this Mycena like mushroom because the spores are so small. I cant find any white mycena with spores of this size. Anyone have any ideas?

Created: 2009-11-29 13:23:47 CST (-0500)
Last modified: 2009-11-29 13:23:47 CST (-0500)
Viewed: 119 times, last viewed: 2017-06-06 07:04:34 CDT (-0400)
Show Log