| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| COORONG | K-827 | X-1648-5N-2M-0Y-2B-0Y[2964]; | TR.SE | S | AUS:SA |
| COOT | CM-225[3692]; | TR.DR | S | MEX | |
| COPAIN | K-55375; PI-428516; AFRC-3155; AUS-20908 | BEN-5308[1346]; BENOIST-5308[69]; OROEL[40]; | TR.AE | W | FRA |
| COPELAND | TR.AE | AUS:New-South-Wales | |||
| COPERNICO | TR.AE | W | ITA | ||
| COPI | CTM-25014[2964]; | TR.SE | S | MEX | |
| COPI-1 | CTM-25014-3M-0Y-0H-0Y-10B-501Y-503M-500RES-0B[2964]; | TR.SE | S | MEX | |
| COPI-1-1 | CTM-25014-3M-0Y-0H-0Y-10B-501Y-503M-503RES-0B[2964]; | TR.SE | S | MEX | |
| COPI-2 | CTM-25014-3M-0Y-0H-0Y-10B-501Y-503M-501RES-0B; | TR.SE | S | MEX | |
| COPI-3 | CTM-25014-3M-0Y-0H-0Y-10B-501Y-500M-500RES-0B[2964]; | TR.SE | S | MEX | |
| COPIFEN | TR.AE | S | CHL | ||
| COPOSU | TR.AE | S | BOL | ||
| COPPEI | K-22189; CI-3088; KU-302 | COPPEI-CLUB[39]; | TR.CO | W | USA:Washington |
| COPPER | PI-502644 | ID-0238[4006]; A-44165-24-1[000]; | TR.AE | S | USA:Idaho |
| COPPS-PURPLE | AFRC-3606; | COPPS-PURPLE-MARKER[220]; | TR.AE | W | NZL |
| COPROLEN | TR.AE | ITA | |||
| COPROMAR-6 | K-56738 | TR.AE | W | ITA | |
| COQUELLES | K-63336 | TR.AE | W | FRA | |
| COQUENA | PI-520109; AUS-20292 | CM-1020[114][144]; | TR.AE | S | MEX |
| COQUENA-S | TR.AE | S | MEX |