Icmadophila is a genus of crustose lichen. The genus has a widespread distribution in the Northern Hemisphere and contains six species. The only species found in North America, Icmadophila ericetorum, has a mint green crustose thallus that is dotted with bright pink apothecial disks, and is sometimes colloquially referred to as "fairy puke".Vitt, D, J Marsh, and R Bovey. 1994. Mosses, lichens, and ferns of northwest North America. Lone Pine Publishing. It aggressively grows over mosses on well-rotted wood and peat.Brodo, I. M., S. D. Sharnoff, and S. Sharnoff. 2001. Lichens of North America. Yale University Press: New Haven. It looks very distinctive, but may be confused with species of Dibaeis.
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