Ochrocladosporium | elatum | |
Ochroconis | constricta | |
Oidiodendron | cereale | |
| echinulatum | |
| maius | |
| periconioides | |
| sp. | |
| tenuissimum | |
| truncatum | |
Oidium | suaveolens | See Geotrichum fragrans |
Oligoporus | caesius | See Cyanosporus caesius |
Oligoporus | ptychogaster | See Postia ptychogaster |
Oligoporus | rennyi | See Postia rennyi |
Omphalotus | guepiniiformis | |
| japonicus | See Omphalotus guepiniiformis |
| olearius | |
Onnia | leporina | See Inonotus leporinus |
Oospora | dulcita | See Trichosporon dulcitum |
Oospora | egyptiaca | See Acremonium egyptiacum |
Oospora | fragrans | See Geotrichum fragrans |
Oospora | gigas | See Saprochaete gigas |
Oospora | halophila | See Aspergillus baarnensis |
Oospora | hyalinula | See Acremonium hyalinulum |
Oospora | klebahnii | See Geotrichum klebahnii |
Oospora | nectricola | See Geotrichum klebahnii |
Oospora | nicotianae | |
| oryzae | |
| polychroma | See Acremonium polychromum |
| pustulans | See Polyscytalum pustulans |
| sajanica | |
| sulphurea | |
| sulphurella | |
| sulphureo-ochracea | See Ovadendron sulphureo-ochraceum |
Ophiocordyceps | sinensis | |
Ophiostoma | coeruleum | See Ceratocystis pilifera |
Ophiostoma | paradoxum | See Ceratocystis paradoxa |
Ophiostoma | piceae | |
| piliferum | See Ceratocystis pilifera |
Osmoporus | odoratus | See Gloeophyllum odoratum |
Ossicaulis | lachnopus | |
| lignatilis | |
| sp. | |
Ostracoderma | dichotomum | See Chromelosporium fulvum |
Oudemansiella | brunneomarginata | See Mucidula brunneomarginata |
Oudemansiella | longipes | See Xerula pudens |
Oudemansiella | mucida | See Mucidula mucida |
Oudemansiella | radicata | See Hymenopellis radicata |
Ovadendron | sulphureo-ochraceum | |
Oxyporus | corticola | |
| latemarginatus | |
| populinus | |