Bücher der Reihe Subwasserflora Von Mitteleuropa / Freshwater Flora of Central Europe

Focuses on freshwater lichens (symbiotic associations of a fungus with a photosynthetic partner, usually green algae or cyanobacteria), which can be found in most running waterbodies with clean water and stable bedrocks, but some species are also characteristic for moderately polluted rivers and lake margins.

Deals with the Synurophyceae, a group of silica scaled chrysophyte algae. This title includes various taxa described worldwide. It gives a basis for further taxonomical studies based on gene sequences.