| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| CLARKAN-VIGO | CI-12990; | TR.AE | W | ||
| CLARKES | AUS-2145 | TR.AE | AUS:New-South-Wales | ||
| CLARKS-CREAM | K-63529; PI-476305; AUS-20088 | CLARKES-CREAM[000]; | TR.AE | W | USA:Kansas |
| CLARKS-DREAM | TR.AE | USA | |||
| CLARO,AUS | TR.AE | AUS | |||
| CLARO-DE-BALAZOTE | TR.DR | ESP | |||
| CLARO-DE-HIGUERUELA | TR.DR | ESP | |||
| CLARO-DE-PETROLA | TR.DR | ESP | |||
| CLARO,ESP | TR.DR | ESP | |||
| CLARO-FINO | K-61144 | CLAROFINO[3599]; | TR.DR | S | ESP |
| CLARO-FINO-DE-BALAZOTE | TR.DR | S | ESP | ||
| CLARO-FINO-DE-POZOCANADA | TR.DR | ESP | |||
| CLARO-FINO-DE-VILLAGORDO | TR.DR | ESP | |||
| CLARUS | RICP-01C0106572 | PBIS-98-94[761][2530]; | TR.AE | W | GBR |
| CLASIC | RICP-01C0106289; RICP-01C0106767 | CLASSIC[761][4136]; PBIS-94-71[4136]; | TR.AE | W | GBR |
| CLAUDIA,CHL | UC-11[1765]; CM-11377-A-1Y-8M-3Y-0M-0CHL[144][145][1765]; | TR.AE | S | CHL,MEX | |
| CLAUDIA,ITA | AUS-23902 | TR.AE | W | ITA:Ferrara | |
| CLAUDIO | TR.DR | S | ITA | ||
| CLAUDIUS,AUT | SL-6-75-3[1541]; | TR.AE | W | AUT | |
| CLAUDIUS,DEU | K-45663; CI-15211 | TR.AE | S | DEU |