| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| COURCELLES | FD-98005-9[4136]; | TR.AE | W | FRA | |
| COURCY | K-63313; ERGE-2083 | TR.AE | W | FRA | |
| COURTAL | K-62815; PI-174618; ERGE-2084; | TR.AE | W | FRA | |
| COURTEL | K-62815 | H-12[2770]; | TR.AE | W | FRA |
| COURTNEY | PI-476848; | TR.AE | S | USA:California | |
| COURTOT | K-50738; AFRC-2892; ERGE-4793 | 2-6-10[418]; | TR.AE | W | FRA |
| COUSIN | TR.AE | AUS:New-South-Wales | |||
| COUTICHES | PI-297322; PI-340685; AFRC-1222; AUS-22140 | TR.AE | W | FRA | |
| COVELLE | TR.DR | S | AUS:Western-Australia | ||
| COWAN | AUS-2198 | TR.AE | S | AUS:New-South-Wales | |
| COWBIRD | PI-428415 | CM-16716-M-3M-2Y-3M-0Y-0BDI[1281]; | TR.AE | S | MEX |
| COWBIRD-S | PI-428415; AUS-18588 | TR.AE | S | MEX | |
| COWBOY | PI-668564 | CO-050322[4321]; | TR.AE | W | USA:Colorado |
| COWERS-RED | TR.AE | W | GBR | ||
| COWHORT | TR.AE | S | AUS:Victoria | ||
| COWLES | K-06340 | W-221[79]; | TR.AE | W | USA |
| COWMAN | TR.AE | S | AUS:Victoria | ||
| COWRA-1 | TR.AE | S | AUS:New-South-Wales | ||
| COWRA-11 | TR.AE | S | AUS:New-South-Wales | ||
| COWRA-12 | TR.AE | S | AUS:New-South-Wales |