Sordaria fimicola 
Southern Soldiers Lichen 
Spathulariopsis velutipes 
Speckled Blister Lichen 
Speckled Tar Spot 
Sphaeronaemella helvellae 
Spindletree Powdery Mildew 
Sporothrix epigloea 
Spotted Dog Lichen 
Spring Hazelcup 
Spring orange peel fungus 
Squamarina cartilaginea 
Squamarina gypsacea 
Stalked Hairy Fairy Cup 
Stalked Orange-peel Fungus 
Stalked scarlet cup 
Star-tipped Reindeer Lichen 
Stereocaulon ramulosum 
Sterocaulon vesuvianum 
Swamp beacon 
Sweetgum Leaf Spot 
Taphrina farlowii 
Tar Lichen 
Tarzetta cupularis