Observation 84199: Mycena acicula (Schaeff.) P. Kumm.

When: 2011-12-01

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

This observation refers to the “giant” with red cap.


On 07/12/2011
On 07/12/2011
On 07/12/2011
On 07/12/2011
A bad photo illustrating the round spores.

Proposed Names

29% (1)
Recognized by sight
31% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thinking twice …
By: zaca
2011-12-08 16:18:18 PST (-0800)

If those things were air bubles, as sava suggested, and were wedged against the cover slit I could saw them thinking that they were inside the basidia. So, the fact is that I know nothing about the spores.

By: zaca
2011-12-08 14:55:12 PST (-0800)

the photo is bad, but it is enough to see some of the round bols (artifacts as you called them) still inside the basidia. Thanks, sava, for your comments.

By: Sava Krstic (sava)
2011-12-08 14:32:08 PST (-0800)

I cannot see clearly … can we be sure that the round artifacts are not air bubbles?

Photo added showing round spores.
By: zaca
2011-12-08 13:43:33 PST (-0800)

Any of the proposals of classification given till now, Mycena adonis and Mycena acicula, have spores completely different from those of this specimen:
- Mycena adonis spores: narrowly ellipsoid, 6–7 by 3–3.5 µm (see here);
- Mycena acicula spores: narrowly elliptical to subfusoid, 8.5-11.5 × 3.0-4.0 µm (see here).

New photos added.
By: zaca
2011-12-07 12:07:49 PST (-0800)

I had no gill shot because, since I wanted to see its evolution, there were no position for the camera. Today I returned to the place, took new photos and collected the specimen. In the meantime it didn’t deveoped much. The overall size was 1.7 cm with +/- 1 mm thick. I already uploaded the new photos.

gill shot
By: Sava Krstic (sava)
2011-12-06 17:06:39 PST (-0800)

The stem seems to me to be at least 1 mm thick, which if correct would be too much for acicula.

Gill shots sometimes help with Mycenas. We can see from them (approximately, which is OK) how many gills reach the stem.

The cap of this mushroom …
By: zaca
2011-12-06 16:29:36 PST (-0800)

seems to be wrinkled. Have you noticed this phenomenon in specimens that you photographed?
Thanks, Dan, for your comment.

wild speculation
By: Dan Molter (shroomydan)
2011-12-06 16:05:47 PST (-0800)

Could it be Marasmius sullivantii on top of Hemimycena?

Created: 2011-12-06 15:51:50 PST (-0800)
Last modified: 2011-12-09 11:42:07 PST (-0800)
Viewed: 114 times, last viewed: 2017-06-10 03:30:25 PDT (-0700)
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