Working documents Ocellomma Ocellomma picconianum Ochrolechia Ochrolechia androgyna Ochrolechia bahusiensis Ochrolechia frigida Ochrolechia laevigata Ochrolechia mahluensis Ochrolechia microstictoides Ochrolechia parella Ochrolechia subviridis Ochrolechia tartarea Ochrolechia turneri Opegrapha Opegrapha atra - see Arthonia atra Opegrapha calcarea - see Arthonia calcarea Opegrapha cesareensis Opegrapha conferta Opegrapha dolomitica Opegrapha gyrocarpa - see Gyrographa gyrocarpa Opegrapha herbarum - see Alyxoria culmigena Opegrapha hochstetteri ined. Opegrapha lithyrga Opegrapha mougeotii - see Alyxoria mougeotii Opegrapha multipuncta Opegrapha niveoatra Opegrapha ochrocheila - see Alyxoria ochrocheila here Opegrapha reactiva Opegrapha rotunda Opegrapha rufescens - see Pseudoschismatomma rufescens Opegrapha rupestris Opegrapha saxigena - see Gyrographa saxigena Opegrapha sphaerophoricola Opegrapha subelevata - see Alyxoria subelevata Opegrapha thelotrematis Opegrapha varia - see Alyxoria varia Opegrapha viridipruinosa - see Alyxoria viridipruinosa Opegrapha vulgata Opegrapha xerica Opegrapha zonata - see Enterographa zonata Ophioparma Ophioparma ventosa Orcularia Orcularia insperata Orphniospora Orphniospora moriopsis