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Comprehensive examination of cercosporoid leaf-spotting hyphomycetes were carried out in the Vientiane capital area of Laos. Twenty-two species of Cercospora, Passalora and Pseudocercospora, including two new species and a new variety are identified, described and illustrated. Taxonomic novelties are the new species Passalora dipterocarpi, P. helicteris-viscidae, and the new variety Pseudocercospora mannanorensis var. paucifasciculata. [ABSTRACT FROM AUTHOR]

Leaf spots or lesions on living plants were collected from the Vientiane area and Bolikhamxay Province of Laos. Any cercosporoid taxa present were recorded, their macroscopic characters observed, cultures were isolated from single spores, and microscopic characters were observed under the microscope. Five Zasmidium species have presently been identified and five of these are new species. In this paper we introduce the taxonomic novelties Zasmidium aporosae, Z. jasminicola, Z. pavettae and Z. suregadae. Furthermore, Stenella manihotis, S. meynae-laxiflorae and S. pseudoramularia are assigned to Zasmidium. [ABSTRACT FROM AUTHOR]