Culberson, WL 1961: The Parmelia quercina group in North America. - Amer. Jour. Bot.48(2): 168-174. [RLL List # 38 / Rec.# 3834] Keywords: PARMELIA/ NEW TAXA/ NORTH AMERICA
Abstract: 12 fig. [On Parmelia quercina (Willd.) Vain., P. coronata Fee, P. confoederata sp. nov., P. galbina Ach., and P. livida Tayl.]