Abstract
This survey of ascomycetes colonizing various substrata in coastal grasslands suggests that their distribution is related to ecological factors of the habitat as well as to the character of each substratum. Of 141 species recorded, 17 were marine, confined to coastal salt marshes, 50 were strictly graminicolous, 69 were widely distributed on diverse substrata including rabbit dung, and a few were strictly terrestrial. The pattern of occurrence in a particular phytocoenosis is characteristic for a large number of species and there appears to be a line of biological discontinuity at the fermentation layer between the upright and prostrate fitter debris and the Aj soil horizon. Dactylomyces crustaceus and Micronectriella agropyri are described as new species. Var. maritima of Pleurage vemiculosis and var. maritima of Rhyparobius cookei are new. Leptosphaeria discors Sacc. & Ellis is transferred to Passeriniella and Pleospora vagans Niessl var. spartinae Webster & Lucas is raised to specific rank.
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