Saprolegnia
ferax

Sarcodontia
setosa

Schizonella
cocconii - melanogramma

Schizophyllum
commune - fasciatum

Schizopora
paradoxa

Sclerophoma
semenospora

Sclerotinia
minor - sclerotiorum

Sclerotium
cepivorum - coffeicola - delphinii - glucanicum

Scopulariopsis
acremonium - brevicaulis - brumptii - coprophila

Scytalidium
flavobrunneum - lignicola - thermophilum

Sepedonium
chrysospermum

Serpula
himantioides

Setosphaeria
prolata - rostrata

Sibirina
coriolopsicola

Sistotrema
brinkmannii

Snow
mold

Sordaria
fimicola - macrospora

Sparassis
crispa

Sphaerobolus
stellatus

Spicaria
sp.

Spongipellis
litschaueri

Sporormiella
isomera

Sporotrichum
azureum

Stachybotrys
bisbyi - chartarum

Staurophoma
sp.

Stemphylium
sarciniforme

Stereum
complicatum - hirsutum - rameale - rugosum - sanguinolentum

Strasseria
geniculata

Stromatinia
gladioli

Stropharia
aeruginosa - albocyanea - albonitens - caerulea - coronilla - halophila - hornemannii - luteonitens - melasperma - ochrocyanea - rugosoannulata - semiglobata - squamosa - thrausta

Suillus
bovinus - granulatus - grevillei - luteus - placidus - tridentinus - variegatus

Sydowia
polyspora

Syncephalastrum
racemosum