Fly agaric 
Fly Death Fungi 
Fly-Speck Leaf Spot 
Fomes excavatus 
Fomes fomentarius 
Fomitiporia robusta 
Fomitopsis ochracea 
Forked Staghorn Fungus 
Foul Clitocybe 
Foxy Bolete 
Fragile Dapperling 
Freckled Dapperling 
Fried Chicken Mushroom 
Fringed Sawgill 
Frost's Bolete 
Frosty bonnet 
Frosty webcap 
Frost’s Amanita 
Fulvifomes everhartii 
Funeral Bells 
Funnel Woodcap 
Furia ithacensis 
Fusarium merismoides 
Fuscopannaria leucostictoides