| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| OPOLSKA | K-42686; PI-274655 | TR.AE | S | POL | |
| OPORA | TR.AE | W | RUS:Altai | ||
| OPSIMI-GREMMENIA | GREMMENIA-OPSIMI[4148]; | TR.DR | GRC | ||
| OPTIDOR | TR.AE | W | FRA | ||
| OPTIMUS | RICP-01C0105812 | TR.AE | W | AUT | |
| OPTION | AFRC-10028 | TR.AE | W | GBR | |
| OPUS | RICP-01C0106750 | PBIS-99-70[3721][4136]; | TR.AE | W | GBR |
| OPYTNYI | B-237-10[1371]; | TR.AE | W | RUS:Moscow | |
| OQUAB-99 | PB-22138-3A-0A-0A-231A-0A[2394]; | TR.AE | S | PAK | |
| OR-1 | CM-104628-0M-20U-51Y-1U-0U[1598][1765]; | TR.AE | S | BRA:Passo-Fundo | |
| OR-10 | K-59307 | OREGON-10[000]; | TR.AE | W | USA:Oregon |
| OR-105 | OREGON-105[000]; | TR.AE | W | USA:Oregon | |
| OR-107 | OREGON-107[000]; | TR.AE | W | USA:Oregon | |
| OR-11488-M-2 | CI-11691 | OREGON-11488-M-2[000]; | TR.AE | I | USA:Oregon |
| OR-11488-M-6 | CI-11692 | OREGON-11488-M-6[000]; | TR.AE | I | USA:Oregon |
| OR-157 | OREGON-157[000]; | TR.AE | W | USA:Oregon | |
| OR-1989-B-1-1-2-1 | CI-11422 | OREGON-1989-B-1-1-2-1[000]; | TR.AE | W,I | USA:Oregon |
| OR-1992-A-4-4-6-1 | CI-11426 | OREGON-1992-A-4-4-6-1[000]; | TR.AE | W | USA:Oregon |
| OR-2001611 | TR.AE | W | USA:Oregon | ||
| OR-2010010 | TR.AE | USA:Oregon |