When: 2012-03-25

Collection location: Ableman’s Gorge State Natural Area, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

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I’ve noticed that too
By: Jason Hollinger (jason)
2012-03-27 17:01:35 PDT (-0700)

The thallus is yellow, so presumably has some anthraquinone pigments in it, but often doesn’t react in K. Must just be because it’s so thin.

K+ Deep Purple
By: Andrew Khitsun (Andrew)
2012-03-27 15:18:30 PDT (-0700)

The color changes on apothecia mostly. The thallus darkens too a little bit, but apothecia have instantaneous color change when touched by KOH.