Observation 18793: Mycena (Pers.) Roussel

When: 2009-02-23

Collection location: southern Tierra del Fuego, Tierra del Fuego, Argentina [Click for map]

Who: Jason Hollinger (jason)

Specimen available

Found these in moss in Nothofagus pumilio forest. CAP 10 mm, glabrous; GILLS somewhat dark-marginate especially when dry, I see minute dark red dots on the gill faces at 20x but I’m assuming these aren’t the spores(!!)… makes me think twice about checking spore color by looking at gills with handlens, though!; STIPE bleeds very dark brick-red at base. How many species of Mycena bleed red?

(number 0223.12, page 177)

Species Lists


Proposed Names

49% (3)
Recognized by sight
28% (1)
Recognized by sight: possibly found in Argentina (see http://www.reflejosdelbosque.com.ar/...), though the photographer admits uncertainty on his/her IDs. also a bleeder. described from New Zealand.

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= Observer’s choice
= Current consensus


Add Comment
Why no overlap between NZ and Patagonia?
By: Jason Hollinger (jason)
2009-02-26 17:59:12 CST (-0600)

Seems there are lots of circumboreal species, why not “circumaustral”, too? Well there is that whole big ocean thing going on…

More bleeding Mycenas
By: Noah Siegel (Noah)
2009-02-24 19:27:16 CST (-0600)

We also have Mycena sanguinolenta which has marginate gills, but it’s not that either.

This looks similar to the New Zealand M. mariae but I doubt that it occurs in Argentina

Guess so…
By: Douglas Smith (douglas)
2009-02-24 10:31:14 CST (-0600)

It certainly looks like a Mycena, that is good enough. Although they also look a lot like M. californiensis… except they are not on oak duff.

Then better to leave it at just “Mycena”…
By: Jason Hollinger (jason)
2009-02-24 10:16:47 CST (-0600)
Mycena haematopus not marginate
By: Douglas Smith (douglas)
2009-02-24 09:42:43 CST (-0600)

These are marginate, M. haematopus not marginate. Actually M. californiensis is marginate, and also bleeds red when cut in the base. (I have this right don’t I?)