ABSTRACTThree new taxa belonging inMarasmiussect.Sicciare described from material collected from southeastern North America:M. pseudobambusinus, M. floridanusvar.virginianus, andM. haematocephalusvar.anomaloides. Marasmius floridanusvar.floridanusis redescribed andM. spadiceusis considered a synonym.M. haematocephalusvar.haematocephalusis reported from the southern Appalachian Mountains. All taxa are illustrated and compared with phenetically similar taxa.