Abstract
Comprehensive examinations of cercosporoid leaf-spotting hyphomycetes were carried out in the central and northern areas of Laos. Thirty-three species of Cercospora, Passalora, Pseudocercospora, Scolecostigmina and Zasmidium, including one new species are identified, described and illustrated. Taxonomic novelty is the new species Zasmidium micromeli.