| Nom complet | Nom | Commentaire | Pays | Spécimens |
|---|---|---|---|---|
| IRCAM | IRCAM | Cameroun | 314 | |
| F.R. Irvine | Irvine | Angleterre | 1 | |
| J.A. | J.A. | 31 | ||
| Jackson | Jackson | 2 | ||
| George Jackson | Jackson G. | Angleterre | 28 | |
| J.A.D. Jackson | Jackson J.A.D. | Nigeria | 1 | |
| Mme Jacquard | Jacquard | France | 1 | |
| H. Jacques | Jacques | Belgique | 21 | |
| Henri Jacques-Félix | Jacques-Félix H. | France | 1074 | |
| Paul Jaeger | Jaeger P. | 1905-1999 | France | 2 |
| James | James | 1 | ||
| E. Jato | Jato | Cameroun | 17 | |
| J.N. | J.N. | Cameroun | 21 | |
| William Henry Johnson | Johnson | Angleterre | 2 | |
| Johnson Madeleine | Johnson M. | Cameroun | 8 | |
| A.T. Johnstone | Johnstone | Angleterre | 1 | |
| A. Jolly | Jolly | France | 4 | |
| Alan Philip Dalby Jones | Jones A.P.D. | 2 | ||
| Eustace Wilkinson Jones | Jones E.W. | Angleterre | 2 | |
| C.C.H. Jongkind | Jongkind C.C.H. | Pays-Bas | 2 |