| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| ORIGON | K-49906 | TR.DR | S | KAZ:Kustanai | |
| ORIHUELA | PI-290485 | TR.DR | S | ESP | |
| ORIIKA | ORIIKA[000]; | TR.AE | W | UKR | |
| ORIN | K-45658; CI-12687; | WA-3514[1318]; | TR.AE | W | USA:Washington |
| ORIOLE | CM-26118[114][144]; | TR.AE | S | MEX | |
| ORION,AUS | AUS-747 | ARION,AUS[113]; | TR.AE | S | AUS |
| ORION,BIH | BL-2-69-89[4368]; | TR.AE | W | BIH | |
| ORIONE | TR.AE | W | ITA:Bologna | ||
| ORION,USA | K-59452; PI-497986 | SW-74-144[1318]; | TR.AE | W | USA:Indiana |
| ORIRIOLI-302 | K-41733 | TR.DR | S | ITA | |
| ORITA | YU-95-89[3556]; | TR.DR | S | USA | |
| ORIYON | CM-85836[4079]; | TR.AE | S | TJK | |
| ORIZABA | II-25918[114][144]; | TR.AE | S | MEX | |
| ORJAUNE | TR.DR | S | DEU | ||
| OR-JUANITO | CM-86106-8Y-0M-0Y-10M-0Y-0BRA[1765]; | TR.AE | S | BRA:Mato-Grosso | |
| ORKAUZ | TR.AE | W | FRA | ||
| ORKHIDEINAYA | TR.AE | W | RUS:Nalchik | ||
| ORKHON-85 | K-59949 | TR.AE | S | MNG | |
| ORKINOS | ORKINOS-1[000]; | TR.AE | I | MEX | |
| ORKIS | ERGE-4926 | TR.AE | W | NLD |