Observation 56958: Parmotrema A. Massal.

When: 2010-10-18

Collection location: Yerba Buena, Colima, Mexico [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

Specimen available

Growing at the edge of a tropical forest.


Proposed Names

28% (1)
Recognized by sight
31% (2)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
Dead lichen
By: Jason Hollinger (jason)
2010-10-27 17:35:49 PDT (-0700)

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.