| afghanistan | jowzjan province | hordeum marinum subsp. gussoneanum | subspecies | 3 | 0 |
| bulgaria | khaskovo province | hordeum marinum subsp. gussoneanum | subspecies | 5 | 0 |
| cyprus | kyrenia district | hordeum marinum subsp. gussoneanum | subspecies | 2 | 0 |
| greece | | hordeum marinum subsp. gussoneanum | subspecies | 2 | 0 |
| iran | hamadan province | hordeum marinum subsp. gussoneanum | subspecies | 7 | 0 |
| italy | | hordeum marinum subsp. gussoneanum | subspecies | 5 | 0 |
| italy | sardinia autonomous region | hordeum marinum subsp. gussoneanum | subspecies | 1 | 0 |
| japan | okayama prefecture | hordeum marinum subsp. gussoneanum | subspecies | 1 | 0 |
| turkey | ankara province | hordeum marinum subsp. gussoneanum | subspecies | 3 | 0 |
| united states | california | hordeum marinum subsp. gussoneanum | subspecies | 3 | 0 |