| Ib-Mac | S 44 |
| Ib-pal | S 22 |
| Icy Blue | R 48 |
| Imperator | R 24 |
| Imperator (Dut.) | R 34 |
| Imperial | R 36 |
| Imperial Blush | R 24 |
| Imperial King | R 36 |
| Inchalong | R & M 38 |
| Indiana Night | R 48 |
| Indian Hills | R 48 |
| Ingeborg | S, R 44 |
| Inspiration | R ± 48 |
| Iowa Maid | R 48 |
| Iris King | S 25 |
| Isoline | S, R 36 |
| Istria | R 44 |
| Ivorine | S 44 |