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

Notes:
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!

Images

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.

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= Observer’s choice
= Current consensus

Comments

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…