| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| CROWN,USA | PI-614671 | D-3117[2965]; WWW-D-3117[3556]; | TR.DR | S | USA |
| CROW-S | AUS-20794 | CM-40457[114][144]; | TR.AE | S | MEX |
| CROXTON-CHAMPION | AFRC-1116 | TR.AE | W | GBR:England | |
| CRUCIBLE | TR.AE | W | GBR | ||
| CRUHICOLLIS | CD-74602[3692]; | TR.DR | S | MEX | |
| CRUSOE | TR.AE | W | GBR | ||
| CRUZADO | TR.AE | S | ITA | ||
| CRUZA-IX | TR.AE | S | CHL | ||
| CRUZ-ALTA-INTA | CM-33729-A-1M-2Y-1M-3Y-0M-1J-0J-0ARG[1281]; | TR.AE | S | ARG | |
| CRUZETO | TR.AE | S | MEX | ||
| CRVENA-OSATKA | TR.AE | S | YUG | ||
| CRVENA-ZVEZDA | K-46629; PI-323641; AUS-10949; AFRC-549 | NS-175[000]; | TR.AE | W | YUG:Serbia |
| CRVENICA | PI-184168 | TR.AE | I | YUG:Serbia | |
| CRVENKA-MESTNA | K-39014 | TR.DR | I | YUG | |
| CRVENKAPA | AUS-25038 | NS-7019[651][2812]; | TR.AE | W | YUG:Serbia |
| CRVENKA,S | K-40023 | BELE-395[2265]; | TR.AE | S | YUG |
| CRVENKA,W | K-39007 | TR.AE | W | YUG | |
| CRW-380 | TR.AE | S | AUS | ||
| CRYSTAL,FRA | PI-351960; ERGE-2103; | TR.AE | W | FRA | |
| CRYSTAL,MICHIGAN | PI-654526 | E-0027[3709]; MSU-LINE-E-0027[3709]; | TR.AE | W | USA:Michigan |