Lendemer, James C. & Rebecca Yahr. Changes and additions to the Checklist of North American Lichens. - II. Mycotaxon 90: 319-322. 2004.

ABSTRACT: Graphis rigidula and Vezdaea retigera are reported for the first time from North America. Placidium tuckermanii has been found to be a junior synonym of Endocarpon arboreum. Thus, the new combination Placidium arboreum is proposed. Lecanora deplanans is placed in synonymy with Ionaspis lacustris. The following names are lectotypified: Endocarpon arboreum, Endocarpon tuckermanii, Lecanora deplanans.

KEYWORDS: None.