Abstract
As author of a flora that should serve diatomists, not only in Europe, as the taxonomic basis of their biological work, one is presented with the following problem when preparing a revision. It should not only reflect the current status of scientific research, but also be so didactically structured, that even biologists without a taxonomic background can work easily with it.
The disparate demands of these goals are very difficult to balanc e, and the authors must decide where compromises must be made.
