| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| CIR | CIRTA-78[144][900][1281]; | TR.AE | S | DZA |
| CIS,1 | CISNE-INIA[144][145][1281]; | TR.AE | S | CHL |
| CIS,2 | CISNE[115]; | TR.DR | S | MEX |
| CIT71 | COCORIT-71[115][1281]; | TR.DR | S | MEX |
| CJ | CAJEME-71[114][144][1281]; | TR.AE | S | MEX |
| CJ54 | CAJEME-54[144][1281]; | TR.AE | S | MEX |
| CK68-15 | COKER-68-15[219][900]; | TR.AE | W | USA:SOUTH-CAROL |
| CK68-19 | COKER-68-19[219][900]; | TR.AE | W | USA:SOUTH-CAROL |
| CKR | CHUKAR[114][144][900][1281]; | TR.AE | S | MEX |
| CLAN | CLANGULA[115][1281]; | TR.DR | S | MEX |
| CLAU | CLAUDIA[145][144][1281]; | TR.AE | S | CHL,MEX |
| CLE | COULEE[219][900][1281]; | TR.AE | W | USA |
| CLEO | CLEOPATRA-74[114][144][1281]; | TR.AE | S | MEX |
| CLI | CHOLI[114][144][900][1281]; | TR.AE | S | CHL,MEX |
| CLLF | COLLAFEN[145][900][1281]; | TR.AE | S | CHL |
| CLLF64 | COLLAFEN-64[145] | TR.AE | S | CHL |
| CLN | COLANO[114][144][900][1281]; | TR.AE | S | USA |
| CLP | CANDEAL-SELECTION-LA-PREVISION[145] | TR.DR | S | ARG |
| CLR,1 | COULTER[900][1281]; | TR.DR | S | CAN |
| CLT | COLOTANA[145][144][900][1281]; | TR.AE | S | BRA |