| Lathyrus pauciflorus Fernald, 1894 |
| Lathyrus pauciflorus subsp. schaffneri (Rydb.) Piper, 1918 |
| Lathyrus pauciflorus var. schaffneri (Rydb.) Jeps., 1936 |
| Lathyrus polymorphus Nutt., 1818 |
| Lathyrus pusillus Elliott, 1824 |
| Lathyrus schaffneri Rydb., 1900 |
| Lathyrus sphaericus Retz., 1783 |
| Lathyrus splendens Kellogg, 1877 |
| Lathyrus strictus Nutt., 1838 |
| Lathyrus sylvestris L., 1753 |
| Lathyrus sylvestris var. latifolius (L.) FIORI, 1925 |
| Lathyrus tingitanus L., 1753 |
| Lathyrus venosus Hemsl., 1879 |
| Lathyrus vestitus Nutt., 1838 |
| Lathyrus vestitus subsp. alefeldii (T.G. White) Broich, 1987 |
| Lathyrus vestitus subsp. laetiflorus (Greene) Broich, 1987 |
| Lathyrus whitei Kupicha, 1894 |
| Lecointea Ducke, 1922 |
| Lecointea amazonica Ducke, 1922 |
| Lennea Klotzsch, 1844 |