Morphology, development, and systematic relevance of pollen and spores

Flora Iranica

Genome and chromatin

Genome and chromatin

Evolution and karyotype differentiation in a family of flowering plants

Survey of the Galium multiflorum complex in western North America

Two new species of Galium (Rubiaceae-Rubieae) from tropical East Africa

Woody plants

Zur Phylogenie der Gattung Galium