Géneros de hongos: Fabraea [12 taxones], Fabrella [1 taxon], Fairmaniella [28 taxones], Falcispora [2 taxones], Falcocladium [1 taxon], Farlowiella [7 taxones], Farysia [67 taxones], Fasciatispora [1 taxon], Favolaschia [83 taxones], Favolus [1 taxon], Favolus [143 taxones], Favostroma [1 taxon], Favotrichophyton [2 taxones], Fayodia [5 taxones], Fellhanera [55 taxones], Feltgeniomyces [1 taxon], Femsjonia [8 taxones], Fenestella [28 taxones], Fennellia [251 taxones], Fennellomyces [1 taxon], Ferrarisia [7 taxones], Fibricium [4 taxones], Fibroporia [1 taxon], Fibulochlamys [1 taxon], Fibulocoela [4 taxones], Fibulomyces [9 taxones], Fibuloporia [1 taxon], Filoboletus [13 taxones], Filosporella [5 taxones], Fimaria [22 taxones], Fimetariella [5 taxones], Fissurina [59 taxones], Fistulina [104 taxones], Fistulinella [5 taxones], Flabellospora [14 taxones], Flagelloscypha [10 taxones], Flagellospora [49 taxones], Flakea [1 taxon], Flaminia [1 taxon], Flammula [52 taxones], Flammulaster [1 taxon], Flammulina [166 taxones], Flaviporus [7 taxones], Flavocetraria [8 taxones], Flavocetrariella [7 taxones], Flavodon [72 taxones], Flavoparmelia [54 taxones], Flavopunctelia [20 taxones], Flavoscypha [2 taxones], Fleischhakia [1 taxon], Floccularia [2 taxones], Flosculomyces [11 taxones], Fluviostroma [5 taxones], Fomes [823 taxones], Fominia [1 taxon], Fomitella [25 taxones], Fomitiporia [3 taxones], Fomitopsis [683 taxones], Fontanospora [1 taxon], Foveostroma [2 taxones], Fracchiaea [12 taxones], Fragosoa [1 taxon], Fragosphaeria [4 taxones], Frankiella [2 taxones], Frankiella [1 taxon], Franzpetrakia [1 taxon], Fraserula [1 taxon], Frommeëlla [3 taxones], Frommea [1 taxon], Fujimyces [14 taxones], Fulgensia [3 taxones], Fuligo [225 taxones], Fuligomyces [1 taxon], Fulvia [92 taxones], Fulvidula [1 taxon], Fulvifomes [22 taxones], Fumago [180 taxones], Funalia [11 taxones], Furcaspora [8 taxones], Fusamen [1 taxon], Fusariella [35 taxones], Fusarium [4291 taxones], Fuscidea [4 taxones], Fuscocerrena [12 taxones], Fuscopannaria [28 taxones], Fuscophialis [17 taxones], Fuscoporella [4 taxones], Fuscoporia [177 taxones], Fusella [2 taxones], Fusichalara [1 taxon], Fusicladiopsis [1 taxon], Fusicladium [163 taxones], Fusicoccum [121 taxones], Fusidium [3 taxones], Fusisporium [7 taxones], Fusoma [7 taxones], Fusticeps [1 taxon]