Observation 212577: Hypholoma (Fr.) P. Kumm.

When: 2015-08-11

Collection location: Pu’u Pili, Kohala, Hawai’i Island, Hawaii, USA [Click for map]

Who: jeff (theoneje)

No specimen available

Perhaps Hypholoma or Psathyrella?

Proposed Names

30% (2)
Recognized by sight
46% (2)
Recognized by sight
56% (4)
Eye3 Eyes3
Recognized by sight
-1% (3)
Recognized by sight: Suggestion genus: M Livezey.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Daniel B. Wheeler (Tuberale)
2015-08-17 00:24:28 -05 (-0500)

I commented on Psathyrella vs. Hypholoma vs. Naematoloma, using my source: Arora, Mushrooms Demystified. The number of recent name changes within these groups of fungi has been particular numerous of late.

Only growing on wood; not ground. Not Mimosa…
By: jeff (theoneje)
2015-08-16 21:49:59 -05 (-0500)

but I don’t know what it is growing on. The wood was too decayed. It is a generally native forest with no woody non-natives. Best candidate is Ohia (Metrosideros polymoprha) or Olapa (Cheirodendron spp.) due to abundance and size of the debris, but could perhaps be Pilo (Coprosma spp.) or Olomea (Perrottetia sandwicensis).

By: Martin Livezey (MLivezey)
2015-08-16 19:44:12 -05 (-0500)

Should I put some more links in here shown Hypholoma in clusters on wood – and that is not the gregarious type of gathering of a lot of Psathyrella on wood or on the ground – that is all of the stems coming from the same hole in a log up off the ground. right? Show us some Psathy’s that are clustered like this…,

By: Daniel B. Wheeler (Tuberale)
2015-08-16 11:24:02 -05 (-0500)

may be a better fit, as it grows in clusters on wood. Hypholoma more frequently found on ground. While substrate not noted, photos certainly strongly indicate hardwood (maybe mimosa or ?). Perhaps jeff remembers the tree type this was found growing on?

I like both suggestions
By: Martin Livezey (MLivezey)
2015-08-13 19:36:41 -05 (-0500)

But I would give the Hypholoma a slightly higher possibility than the Psathyrella. We need more of a specialist than I am. But some microscopy would help if you can do that…,

It is growing more like a Hypholoma, it is clustered (like H.), and the cap is reminiscent of ‘brick top’, H. lateritium


Created: 2015-08-12 01:57:29 -05 (-0500)
Last modified: 2015-08-17 21:51:30 -05 (-0500)
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