Juncus roemerianus is an important component of salt marshes of the United States east coast and the Gulf of Mexico. This plant supports a large biodiversity of decomposers, mostly ascomycetes and coelomycetes, unknown even a few years ago. Koorchaloma galateae sp. nov. is an obligate marine species from the base of culms; Pestalotiopsis juncestris sp. nov. is a facultative marine species and grows in the middle of culms and on involucral leaves; Tetranacriella papillata anam.-gen. et sp. nov. can be classified as a terrestrial but halotolerant species, occurring in the middle and upper part of leaves and on involucral leaves. All three species are known so far only from North Carolina.
Floricola striata anam.-gen. et sp. nov. is described from senescent inflorescences, culms and leaves, Septoriella unigalerita anam.-sp. nov. and Stagonospora abundata anam.-sp. nov. from senescent standing leaves of Juncus roemerianus at the U. S. east coast. Floricola striata and Stagonospora abundata are facultative marine species from the base and middle of the plant, whereas Septoriella unigalerita can be classified as a terrestrial, but halotolerant species, growing in the middle and tip of the leaves.
Although the number of algicolous fungi is small, they are of particular interest because of their parasitic or symbiotic properties. Only 79 species of filamentous fungi—out of a total of 465 marine species—are associated with marine algae, and 18 with animals; many of them have not been illustrated in detail. The present paper provides illustrations and full descriptions of 8 marine ascomycetes, 6 of them from algae and 2 from animal hosts. The algicolous species belong to the genera Didymella, Haloguignardia, Spathulospora and Turgidosculum; those from animals are members of Abyssomyces and Laboulbenia. The illustrations are line drawings made with the aid of a camera lucida, and are almost all based on type material.