Observation 56958: Parmotrema A. Massal.
When: 2010-10-18
Herbarium specimen reported

Notes: Growing at the edge of a tropical forest.

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Recognized by sight
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Comments

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Dead lichen
By: Jason Hollinger (jason)
2010-10-28 11:35:49 AEDT (+1100)

Leave it to a mycologist to only be interested in lichens when they turn wacky colors when they die… :)

I think the color is likely the result of one of the “lichen substances” produced by the lichen. For example, tropical species often produce things in the stictic acid complex or salazinic acid. These all turn orange to red in alkali conditions. Maybe when the lichen dies, decaying hyphae or algae create conditions which cause the acids to turn colors. I’ve seen Parmotrema and Parmelia do this. Just a guess.

Created: 2010-10-28 09:18:12 AEDT (+1100)
Last modified: 2011-03-25 01:32:31 AEDT (+1100)
Viewed: 22 times, last viewed: 2016-10-25 21:34:33 AEDT (+1100)
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