Ahti, T 1966: Parmelia olivacea and the allied non-isidiate and non-sorediate corticolous lichens in the Northern Hemisphere. - Acta Bot. Fenn.70: 1-68. [RLL List # 59 / Rec.# 296] Keywords: KEY/ PARMELIA/ MELANELIA/ NORTHERN HEMISPHERE/ NEW TAXA
Abstract: [9 spp.; key. New: Parmelia olivacea var. albopunctata comb. nov., P. septentrionalis (Lynge) comb. nov., P. halei sp. nov., P. tabeculata sp. nov.]