| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| CLM-829 | TR.DR | S | MEX | ||
| CLN-YD | II-19957[1281]; | TR.AE | MEX | ||
| CLOCHES-25 | TR.AE | FRA | |||
| CLOCHES-26 | K-45689; ERGE-2063; | TR.AE | W | FRA | |
| CLOCK | TR.TG | GBR:England | |||
| CLONEL-4 | TR.AE | AUS:New-South-Wales | |||
| CLONEL-7 | TR.AE | AUS:New-South-Wales | |||
| CLOSEAUX | BLE-DES-CLOSEAUX[39]; | TR.AE | W | FRA | |
| CLOUD | K-51789; CI-17276; AUS-17263 | KS-7016[937][1318]; | TR.AE | W | USA:Kansas |
| CLOVATINO | TR.AE | W | |||
| CLOVE | TR.AE | W | GBR | ||
| CLOVERS-RED | K-6263; | CLOVERS-ROTER-WEIZEN[39]; | TR.AE | W | GBR |
| CLOVIS | TR.AE | W | BEL | ||
| CLUB,DEU | K-64006; AFRC-9375 | SCHW-10276[4325]; | TR.AE | W | DEU |
| CLUBHEAD | K-44484; AUS-2152 | CALIFORNEAN-CLUB[56][39]; | TR.CO | S | AUS |
| CLUB-HEADED | ROUGH-CHAFFED-ESSEX[39]; | TR.CO | |||
| CLUB-WHEAT | KU-150; | CANADA-CLUB-SPRING-WHEAT[39]; OREGON-CLUB[39]; BIG-CLUB[39]; | TR.CO | S | CAN |
| CLUDOR | TR.AE | S | DEU | ||
| CLUJ-1717 | AFRC-811 | TR.AE | W | ROM | |
| CLUJ-2251 | AFRC-812 | TR.AE | S | ROM |