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ABSTRACT
A new species, Marssonina obclavata, is described from Smilax. It is characterized by an epidermal conidioma composed of three to five layers of cells forming a textura globulosa to textura angulata, conidiogenous cells with a thin to thick periclinal thickening or occasionally annellations, and obclavate conidia. Some aspects of the conidiomata and conidiogenesis are similar to those of Septogloeum. The conidiomata, conidiogenesis and conidia of Marssonina and Septogloeum are compared and contrasted. Additional information on Septogloeum carthusianum and S. thomasianum is provided.