When: 2010-11-07

Collection location: Dabney Creek, Madison Co., Arkansas, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

on siliceous sandstone outcrop in shaded forest near ridge top

This is the only saxicolous, poriform Pertusaria with norstictic acid in the Ozarks, so microscopy unnecessary. The UV+ ice-blue is not mentioned, but was reliable among the several specimens I collected.


wart sliced open to show “cryptolecanorine” apothecia

Proposed Names

87% (1)
Used references: Ozark Keys, Harris & Ladd 2005.
Based on chemical features: medulla K+ yellow to bright red, C-, KC-, UV+ ice-blue

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= Observer’s choice
= Current consensus


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