| Huanaca spananthe (Willd.) Véla ex Lag., 1821 |
| Imperatoria L., 1753 |
| Laretia Gillies & Hook., 1830 |
| Leptocaulis Nutt. ex DC., 1829 |
| Leptocaulis inermis Nutt. ex DC., 1829 |
| Levisticum Hill, 1756 |
| Ligusticum L., 1753 |
| Ligusticum foeniculum (L.) Crantz, 1767 |
| Ligusticum madrense J.M. Coult. & Rose, 1905 |
| Ligusticum porteri J.M. Coult. & Rose, 1888 |
| Ligusticum tolucense Kunth, 1821 |
| Lilaeopsis Greene, 1891 |
| Lilaeopsis recurva A.W. Hill, 1927 |
| Lilaeopsis schaffneriana (Schltdl.) J.M. Coult. & Rose, 1897 |
| Lilaeopsis schaffneriana subsp. schaffneriana (Schltdl.) J.M. Coult. & Rose, 1897 |
| Lomatium Raf., 1819 |
| Lomatium insulare (Eastw.) Munz, 1935 |
| Lomatium mohavense (J.M. Coult. & Rose) J.M. Coult. & Rose, 1900 |
| Lomatium nevadense (S. Watson) J.M. Coult. & Rose, 1900 |
| Mackinlayoideae G.M. Plunkett & Lowry, 2004 |