Observation 15809: Mycena (Pers.) Roussel

When: 2008-12-24

Collection location: Santa Rosa, Sonoma Co., California, USA [Click for map]

Who: Debbie Drechsler (debdrex)

Specimen available

Fruiting terrestrially and alone in association with live oak. Pileus is 3cm across, stipe is 4mm and total height is 5.5cm. Spores are white. I’m stumped!


Proposed Names

27% (3)
Recognized by sight: It reminds a bit of Mycena megaspora, but it should have had a straight and rooting stem, so I won’t propose that. The spores remain to be measured too.
-46% (4)
Recognized by sight: Compare to observation 18990 and see notes in that observation. The stem of this specimen broke off when I pulled it out of the ground, which might explain the confusingly un-taproot-like structure.
-64% (2)
Used references: read comments below. H. ovina or H. subovina look like pretty close matches.
9% (3)
Recognized by sight
15% (4)
Used references: The Genus Tephrocybe (Key)
by PD Orton
*comparison of macroscopic characteristics fits well.

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

= Observer’s choice
= Current consensus


Add Comment
By: Erin Page Blanchard (CureCat)
2009-03-01 02:22:58 -03 (-0300)

Good call Darvin.

By: Erin Page Blanchard (CureCat)
2009-03-01 01:17:41 -03 (-0300)

I really doubt C. umbonata. This “black form” doesn’t look anything like the Redwood Rooters I have found. I can’t imagine in my wildest dreams that a “normal” looking C. umbonata would age to look like this.

By: Dave W (Dave W)
2008-12-29 23:15:15 -02 (-0200)

Roody calls the stalk of H. subovina “compressed.” I also see this on some of the colorful summertime Hygrocybes. I would imagine that H. subovina and H. ovina may be regional DNA-seperable versions of more-or-less the same type of mushroom.

Hygrocybe is a good guess…
By: Debbie Viess (amanitarita)
2008-12-29 23:07:22 -02 (-0200)

and there are some dark forms; the split stalk is also typical of that genus, but subovinus doesn’t occur here.

did the gills feel waxy to the touch?

H. ovinus is the best that I can do w/Arora, but doesn’t really match the photos of the European forms. with a specimen, scope and Agaricales of CA you can prob. do better! or not. I’d go w/Hygrocybe as a genus, for now.

The white-spored blackish shroom
By: Dave W (Dave W)
2008-12-29 22:31:47 -02 (-0200)

I thought this one might be Hygrocybe subovina. One may find this species documented on p. 179 of Roody’s “Mushrooms of West Virginia…” which is available online.

Yeah, as I said…
By: Debbie Drechsler (debdrex)
2008-12-29 19:44:54 -02 (-0200)

…white spore print has me stumped. It was white not pink not light pink but white.

Check spore print…
By: Douglas Smith (douglas)
2008-12-29 19:06:26 -02 (-0200)

This one looks rather Leptonia-ish to me, not really Mycena-ish…