The book has images oft the Genera Acanthotrema; Allographa, Amandinea, Ampliotrema, Anomomorpha, Anthracothecium, Arthonia, Astrochapsa, Astrothelium, Bacidiopsora, Bathelium, Bogoriella, Bulbothrix, Calopadia, Carbacanthographis, Chapsa, Chiodecton, Chroodiscus, Chrysothrix, Cladonia, Coccocarpia, Coenogonium, Coniocarpon, Corticorygma, Creographa, Cresponea, Crustospathula, Crypthonia, Cryptoschizotrema, Cryptothecia, Dichoporis, Dichosporidium, Diorygma, Dyplolabia, Echinoplaca, Erythrodecton, Eschatogonia, Fellhanera, Fissurina, Flabelloporina, Gassicurtia, Glaucotrema, Glyphis, Graphis, Herpothallon, Heterocyphelium, Heterodermia, Leptogium, Letrouitia, Lithothelium, Macroconstrictolumina, Malmidea, Malmographina, Mazosiam Megalaria, Melaspilea, Myeloconis, Myriostigma, Myriotrema, Neoprotoparmelia, Neosergipea, Nitidochapsa, Ocellularia, Opegrapha, Papilionovela, Parallopsora, Parmotrema, Phaeographina, Phaeographis, Phyllopsora, Physcia, Platythecium, Porina, Pseudobogoriella, Pseudochapsa, Pyrenula, Pyrgillus, Pyxine, Redingeria, Sarcographa, Sclerophyton, Sprucidea, Stegobolus, Stirtonia, Thelotrema, Trinathotrema, Trypethelium, Tylophoron, Wirthiotrema.