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Due to the color and form of apothecia, there is always the possibility of this to be Caloplaca. This could be simply confirmed with the spot tests. If there is a K- or K+ reaction not purple, then more probably it is a Trapelia. T. coartacta has a C+ red reaction and can be similar (see, e.g. the photos in observation 86132).
Created: 2014-05-10 18:41:46 CDT (-0400)
Last modified: 2014-05-10 18:42:00 CDT (-0400)
Viewed: 17 times, last viewed: 2016-10-28 08:23:16 CDT (-0400)