| California Gold | R 48 |
| Calypso | L, S 24 |
| Cameleon | S 24 |
| Canary | S 24 |
| Canary Bird | L 24 |
| Candlelight | R 48 |
| Capitola | R 43 |
| Caprice | L, S 24 |
| Captain Wells | R 48 |
| Cardinal | R 49 |
| Caroline Burr | R 50 |
| Carpathia | R & M 32 |
| Castalia | R 36 |
| Caterina | R 48 |
| Cathedral Dome | R ± 48 |
| Caylus | S 52 |
| Cellophane | R 49 |
| Chalice | R 24 |
| Chamois | R ± 48 |
| Chancelot | R 32 |
| Charles Hardie | R 70 |
| Chartier | R 24 |
| Chasseur | S 24 |
| Cheerio | R 49 |
| Chef Menteur | R 42 |
| Chevron | R 45 |
| China Maid | R 48 |
| Choir Boy | R 48 |
| Christabel | R 49 |
| City of Lincoln | R 48 |
| Clara Noyes | R 24 |
| Clarette | R & M 20 |
| Claribel | R 48 |
| Clio | S 24 |
| Cluny | S 24 |
| Cogette | R 22 |
| Colossus | R 48 |
| Compacta | R & M 40 |
| Conquistador | R 49 |
| Constance Meyer | R 49 |
| Contemplation | R ± 48 |
| Copper Lustre | R 49 |
| Copper Rose | R 48 |
| Coquetry | R 48 |
| Coralie | R ± 48 |
| Cordelia | S, K 25 |
| Coronation | R 36 |
| Corrida | R 24 |
| Cortez | R ± 48 |
| Courtisane | R ± 48 |
| Cream Tart | R 31 |
| Creole Belle | R 47 |
| Cretica | R 32 |
| Crimson King | R 44 |
| Crown Jewel | R 24 |
| Crysoro | R 45 |
| Crystal Beauty | R 36 |
| Curiosity | R & M 40 |
| Cyanea | R 40 |