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, Cryptos...