| Hysterium | |
|---|---|
 | |
| Hysterium angustatum on decorticated wood near Shimada, Shizuoka, Japan | |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Hysteriales |
| Family: | Hysteriaceae |
| Genus: | Hysterium Pers. |
Hysterium is a genus of fungi belonging to the family Hysteriaceae.
The genus has cosmopolitan distribution.