| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| OSMUT | TR.AE | W | CHE | ||
| OSO | B-6891[2964]; | TR.SE | S | MEX | |
| OSORNO | K-3848 | TR.SE | W | DEU | |
| OSPREY,AUS | AUS-22110; AFRC-5616; PI-483062 | M-2386[113][176][1335]; | TR.AE | W | AUS:New-South-Wales |
| OSPREY,MEX,TR.AE | CM-8701[114][144]; | TR.AE | S | MEX | |
| OSPREY,MEX,TR.DR | CD-8220[1281][3692]; | TR.DR | S | MEX | |
| OSPREY-S | AUS-18733 | TR.AE | S | MEX | |
| OS-R-023 | OS.R-023[39]; | TR.AE | W | FIN | |
| OS-R-033 | OS.R-033[39]; | TR.AE | W | FIN | |
| OSSER | K-50583; AUS-23648 | TR.AE | W | DEU | |
| OST | K-45683 | TR.AE | W | DNK | |
| OSTANKINSKAYA | ZERNOKORMOVAYA-26[413]; ZP-26[3348]; | TR.AG | W | RUS:Moscow | |
| OSTAR | RICP-01C0106321 | TR.SP | W | CHE | |
| OSTARA | AFRC-9418 | CWW-90-6[4325]; | TR.AE | W | GBR |
| OSTBU-06 | O-06[221]; | TR.AE | S | NOR | |
| OSTBY | K-34981; NGB-8922 | TR.AE | S | DNK | |
| OSTERMEYER-DAGA-DICHT | K-40915 | TR.AE | W | DEU | |
| OSTERPEYS-FRANKENTHALER-BRAUNE | K-40892 | OSTERPEYES-FRANKENTHALER-BRAUN[541]; | TR.AE | W | RUS:Kaliningrad |
| OSTERSPANS-FRANKENTHALER-BRAUNER-DICKKOPF | TR.AE | DEU | |||
| OSTERVALLSKOG | TR.AE | SWE |