| Xanthophyllomyces dendrorhous |
MycoBank | / Index Fungorum | / Genbank | |
| Xanthoria parietina |
MycoBank | / Index Fungorum | / Genbank | |
| Xanthothecium peruvianum |
MycoBank | / Index Fungorum | / Genbank | |
| Xenasma praeteritum |
MycoBank | / Index Fungorum | - | |
| Xenasma pruinosum |
MycoBank | / Index Fungorum | - | |
| Xenasma pulverulentum |
MycoBank | / Index Fungorum | - | |
| Xenasma rimicolum |
MycoBank | / Index Fungorum | - | |
| Xenasma tulasnelloideum |
MycoBank | / Index Fungorum | - | |
| Xenasmatella filicina |
MycoBank | / Index Fungorum | - | |
| Xenasmatella vaga |
MycoBank | / Index Fungorum | / Genbank | |
| Xenobotrytis acaducospora |
MycoBank | / Index Fungorum | / Genbank | |
| Xenocylindrocladium serpens |
MycoBank | / Index Fungorum | - | |
| Xenolophium sp. |
MycoBank | / Index Fungorum | - | |
| Xenomeris abietis |
MycoBank | / Index Fungorum | - | |
| Xenomeris raetica |
MycoBank | / Index Fungorum | / Genbank | |
| Xenosporium berkeleyi |
MycoBank | / Index Fungorum | / Genbank | |
| Xenotypa aterrima |
MycoBank | / Index Fungorum | - | |
| Xepicula leucotricha |
MycoBank | / Index Fungorum | - | |
| Xepiculopsis graminea |
MycoBank | / Index Fungorum | - | |
| Xerocomus badius |
MycoBank | / Index Fungorum | / Genbank | |
| Xerocomus chrysenteron |
MycoBank | / Index Fungorum | / Genbank | |
| Xerocomus rubellus |
MycoBank | / Index Fungorum | / Genbank | |
| Xerocomus subtomentosus |
MycoBank | / Index Fungorum | / Genbank | |
| Xeromphalina campanella |
MycoBank | / Index Fungorum | / Genbank | |
| Xeromphalina caulicinalis |
MycoBank | / Index Fungorum | - | |
| Xeromphalina cauticinalis |
- | - | / Genbank | |
| Xeromphalina cornui |
MycoBank | / Index Fungorum | / Genbank | |
| Xeromphalina fellea |
MycoBank | / Index Fungorum | - | |
| Xeromphalina fulvipes |
MycoBank | / Index Fungorum | - | |
| Xeromphalina sp. |
MycoBank | / Index Fungorum | - | |
| Xeromphalina tenuipes |
MycoBank | / Index Fungorum | - | |
| Xeromyces bisporus |
MycoBank | / Index Fungorum | / Genbank | |
| Xerotus archeri |
MycoBank | / Index Fungorum | - | |
| Xerotus fuliginosus |
MycoBank | / Index Fungorum | - | |
| Xerotus papyraceus |
MycoBank | / Index Fungorum | - | |
| Xerula caussei |
MycoBank | / Index Fungorum | / Genbank | |
| Xerula longipes |
MycoBank | / Index Fungorum | - | |
| Xerula megalospora |
MycoBank | / Index Fungorum | / Genbank | |
| Xerula melanotricha |
MycoBank | / Index Fungorum | - | |
| Xerula pudens |
MycoBank | / Index Fungorum | / Genbank | |
| Xerula radicata |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria acuta |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria allantoidea |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria anisopleura |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria apiculata |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria arbuscula |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria atrosphaerica |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria carpophila |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria castorea |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria corniformis |
- | - | - | |
| Xylaria cornu-damae |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria cubensis |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria curta |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria digitata |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria enterogena |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria enteroleuca |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria feejeensis |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria filiformis |
MycoBank | / Index Fungorum | - | |
| Xylaria fioriana |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria gracilissima |
- | - | - | |
| Xylaria graminicola |
MycoBank | / Index Fungorum | - | |
| Xylaria grammica |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria hippotrichioides |
MycoBank | / Index Fungorum | - | |
| Xylaria hypoxylon |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria ianthina-velutina |
- | - | - | |
| Xylaria johorensis |
MycoBank | / Index Fungorum | - | |
| Xylaria laevis |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria longipes |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria magnoliae |
MycoBank | / Index Fungorum | - | |
| Xylaria mali |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria microceras |
MycoBank | / Index Fungorum | - | |
| Xylaria multiplex |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria nigripes |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria palmicola |
MycoBank | / Index Fungorum | - | |
| Xylaria persicaria |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria polymorpha |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria psamathos |
MycoBank | / Index Fungorum | - | |
| Xylaria rhophaloides |
- | - | - | |
| Xylaria schweinitzii |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria sicula |
MycoBank | / Index Fungorum | - | |
| Xylaria sicula f. major |
MycoBank | / Index Fungorum | - | |
| Xylaria sp. |
- | - | - | |
| Xylaria subterranea |
MycoBank | / Index Fungorum | - | |
| Xylaria telfairii |
MycoBank | / Index Fungorum | / Genbank | |
| Xylaria tuberosa |
- | - | - | |
| Xylaria vaporaria |
MycoBank | / Index Fungorum | - | |
| Xylobolus annosus |
MycoBank | / Index Fungorum | - | |
| Xylobolus frustulatus |
MycoBank | / Index Fungorum | / Genbank | |
| Xylobolus illudens |
MycoBank | / Index Fungorum | - | |
| Xylobolus princeps |
MycoBank | / Index Fungorum | - | |
| Xylobolus spectabilis |
MycoBank | / Index Fungorum | - | |
| Xylobolus subpileatus |
MycoBank | / Index Fungorum | / Genbank | |
| Xylochia stegonsporioides |
MycoBank | / Index Fungorum | - | |
| Xylocladium clautriavii |
MycoBank | / Index Fungorum | - | |
| Xylocladium sp. |
MycoBank | / Index Fungorum | - | |
| Xylocoremium flabelliforme |
MycoBank | / Index Fungorum | - | |
| Xylogone sphaerospora |
MycoBank | / Index Fungorum | - | |
| Xylohypha bantiana |
MycoBank | / Index Fungorum | / Genbank | |
| Xylohypha curta |
MycoBank | / Index Fungorum | - | |
| Xylohypha emmonsii |
MycoBank | / Index Fungorum | - | |
| Xylohypha ferruginosa |
MycoBank | / Index Fungorum | - | |
| Xylohypha lignicola |
MycoBank | / Index Fungorum | - | |
| Xylohypha nigrescens |
MycoBank | / Index Fungorum | - | |
| Xylohypha novaeglandiae |
- | - | - | |
| Xylohypha sp. |
- | - | - | |
| Xylomyces aquaticus |
MycoBank | / Index Fungorum | - | |
| Xylomyces chlamydosporis |
MycoBank | / Index Fungorum | - | |
| Xylomyces elegans |
MycoBank | / Index Fungorum | - | |
| Xylomyces sp. |
MycoBank | / Index Fungorum | - | |
| Xylosphaera apiculata |
MycoBank | / Index Fungorum | - | |
| Xylosphaera mellisi |
- | - | - | |
| Xylosphaera polymorpha |
MycoBank | / Index Fungorum | - | |
| Xynophila mephitalis |
MycoBank | / Index Fungorum | - | |