Schizopora phellinoides – synonym of Schizopora flavipora
Sclerotinia tuberosa – synonym of Dumontinia tuberosa
Sepultaria sumneriana – synonym of Geopora sumneriana
Sepultaria tenuis – synonym of Geopora tenuis
Sowerbyella unicolor – synonym of Sowerbyella imperialis
Spongiporus leucomallellus – synonym of Oligoporus leucomallellus
Stereum rameale – synonym of Stereum ochraceoflavum
Stereum sanguinolentum – synonym of Physisporinus sanguinolentus
Strobilomyces flocculosus – synonym of Strobilomyces strobilaceus
Stropharia aeruginosa – synonym of Psilocybe aeruginosa
Stropharia aurantiaca – synonym of Psilocybe aurantiaca
Stropharia coronilla – synonym of Psilocybe coronilla
Stropharia cyanea – synonym of Psilocybe caerulea
Stropharia inuncta – synonym of Psilocybe inuncta
Stropharia percevalii – synonym of Psilocybe percevalii
Stropharia rugoso-annulata – synonym of Psilocybe rugosoannulata
Stropharia rugosoannulata – synonym of Psilocybe rugosoannulata
Stropharia semiglobata – synonym of Psilocybe semiglobata
Stropharia squamosa – synonym of Psilocybe squamosa