Spore and pollen assemblages occurring in an Upper Pennsylvanian Redstone coal seam are used to interpret phytoecological history of the swamp in which source material was deposited. Punctatosporites minutus and other bilaterally symmetrical monolete spore species predominate through the thickness of the seam, masking vertical variation of other more significant species. With their removal, additional assemblages were recognized, some of which correspond closely to variations in maceral content of the seam. As a result, three phases in the ecological development of the Redstone coal were distinguished. Forty-nine sporomorph species in 34 genera were recognized, 10 species and one genus, Stripites, being new. Densosporites and Cristatisporites are reported for the first time from an Upper Pennsylvanian coal seam in the United States.

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