| Iodanthus (Torr. & A. Gray) Steud., 1840 |
| Iodanthus acuminatus Rollins, 1942 |
| Iodanthus mexicanus Rollins, 1942 |
| Iodanthus petiolatus (Hemsl.) Rollins, 1942 |
| Iodanthus striatus M.E. Jones, 1929 |
| Irio (DC.) Fourr., 1868 |
| Iti Garn.-Jones & P. N. Johnson, 1988 |
| Kandis Adans., 1763 |
| Kardanoglyphos Schltdl., 1857 |
| Koniga R. Br., 1826 |
| Koniga maritima (L.) R. Br., 1826 |
| Kotschyella F.K. Mey., 1973 |
| Lagowskia Trautv., 1858 |
| Lamprophragma O.E. Schulz, 1924 |
| Lamprophragma longifolium (Benth.) O.E. Schulz, 1924 |
| Leavenworthieae V.I. Dorof., 2004 |
| Lepia Desv., 1815 |
| Lepicochlea Rojas Acosta, 1918 |
| Lepidieae DC., 1821 |
| Lepidium L., 1753 |