Observation 164355: Polyporales sensu lato

When: 2014-04-27

Collection location: Moon Lake Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

I did not ID the host wood type.

KOH orange on cap and on pores.


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Correct me
By: Phil Yeager (gunchky)
2014-04-30 12:41:06 AEST (+1000)

if I’m wrong, but I believe algae grows on many fungi.

Good idea Phil,
By: Dave W (Dave W)
2014-04-30 12:30:57 AEST (+1000)

I would also add that there appears to be a thin mossy sheen covering this. In fact, the pores/tubes have begun to turn greenish. Maybe the orange KOH reaction has more to do with something growing on this polypore. I’ll ask some of the Chem/Bio people at LCCC for an opinion about KOH reactions.

By: Phil Yeager (gunchky)
2014-04-30 12:21:28 AEST (+1000)

In your notes you mentioned that the fruit bodies were aged an turning brownish. Perhaps the KOH reaction with the brown coloration caused the orange color that you perceived. Since you are on the faculty at LCCC. I would reccomend that you speak with one of the chemistry Profs. I have done so in the past and they were very considerate.

The long hairs on the upper surface…
By: Dave W (Dave W)
2014-04-30 12:07:18 AEST (+1000)

and the large pores appear to match well with Coriolopsis. The small amount of info I have found regarding KOH reaction for a couple species reports a change to black. So the orange KOH reaction here continues to be mysterious.

As T. elegans
By: Phil Yeager (gunchky)
2014-04-30 11:57:33 AEST (+1000)

ages its pores become darker, but KOH produces a yellow color on it. Your mushroom has more hairs on it than I have on my head.

Pores seem large and elongated…
By: Dave W (Dave W)
2014-04-30 11:49:17 AEST (+1000)

for Trametes, except for T. elegans. But the colors are dark for T. elegans.

By: Phil Yeager (gunchky)
2014-04-30 11:44:16 AEST (+1000)

Trametes spp. should be yellow to dull yellow in KOH.

By: Phil Yeager (gunchky)
2014-04-30 10:52:53 AEST (+1000)

look long and stiff. Could also be T. Villosa or T. hispidus.

I had originally thought…
By: Dave W (Dave W)
2014-04-29 14:57:45 AEST (+1000)

“Daedaleopsis” or “Daedalea”, but the KOH reaction was way off. Should be black, but I got orange on both upper surface and pores. This could, however, be due to the fruit body being old.

Created: 2014-04-29 14:08:01 AEST (+1000)
Last modified: 2017-02-27 16:44:48 AEDT (+1100)
Viewed: 103 times, last viewed: 2019-07-13 08:57:29 AEST (+1000)
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