This book mostly illustrates recently collected lichens from the Brazilian state of Rondônia, which is a an Amazonian state bordering Bolivia. Although it is 5000 km from the see, it is already lowland at around 100 m altitude. For several species it is the first pulished colour picture.

New species
Cryptothecia reagens Aptroot & Schumm sp. nov.
Diorygma fissuroxanthonicum Aptroot & Schumm sp. nov.
Micarea bacillispora Aptroot & Schumm sp. nov.
Micarea isidiothallina Aptroot & Schumm sp. nov.
Neosergipea rubrosorediata Aptroot & Schumm sp.nov.

New combination
Fissurina bothynocarpa (Redinger) Aptroot & Schumm comb. nov.; basionym Graphina bothynocarpa Redinger, Ark. Bot. 27A(no. 3): 96, fig. 3 (1935). Mycobank 850738.