Observation 80632: Exidiopsis effusa Bref.
When: 2010-10-25
No herbarium specimen

Notes: An amateur sent these two photos to the NY State Conservationist magazine and they were referred to me. I’ve never seen vertically oriented hyphal strands like this before coming from under the bark of a hardwood log which looks like beech.

A third photo sent looks like mycelium of a different fungus, but might offer a clue.

She thought at first it was ice. It appears to look like plastic bristles of a brush, but along a log?

Any ideas?

Proposed Names

25% (1)
Recognized by sight: I was sent these two photographs by an amateur of this Mycelial? growth from a hardwood log, seen in the fall of 2010
10% (5)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Awesome link, Alan.
By: Danny Newman (myxomop)
2015-07-22 23:26:28 CEST (+0200)

Thanks! Here’s a time lapse video of its growth:


Something similar
By: Darvin DeShazer (darv)
2011-10-26 06:46:16 CEST (+0200)

Reminds me of a Phycomycete, but I doubt it.

This post says it might be ICE that gets pressed out of wood in thin threads.

Frost Flowers
By: Tim Sage (T. Sage)
2011-10-25 20:41:17 CEST (+0200)


Log ice
By: Sue Van Hook (svanhook)
2011-10-25 20:38:37 CEST (+0200)

thank you for sending the other photos of ice extruded from logs. If you know the name of this phenomenon, please send it along.

By: TimmiT
2011-10-25 19:11:00 CEST (+0200)

I remember seeing this before on MO (here). I thought it was amazing.

Wow, I stand corrected….
By: Tim Sage (T. Sage)
2011-10-25 18:59:47 CEST (+0200)

Thanks! Very cool!

very cool
By: Danny Newman (myxomop)
2011-10-25 18:40:48 CEST (+0200)
Yes, it’s ice
By: Irene Andersson (irenea)
2011-10-25 18:36:14 CEST (+0200)
That is not ice.
By: Tim Sage (T. Sage)
2011-10-25 18:28:26 CEST (+0200)

Although I don’t know what it is.

The first guess was ice
By: Irene Andersson (irenea)
2011-10-25 16:24:15 CEST (+0200)

- and it is.

Created: 2011-10-25 15:40:27 CEST (+0200)
Last modified: 2015-07-23 00:26:47 CEST (+0200)
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