| Lens esculenta Moench, 1794 |
| Lens lens (L.) Huth, 1893 |
| Leptoglottis DC., 1827 |
| Leptoglottis nelsonii Britton & Rose, 1928 |
| Leptoglottis palmeri Britton & Rose, 1928 |
| Leptoglottis paucijuga Britton & Rose, 1928 |
| Leptoglottis potosina Britton & Rose, 1928 |
| Leptoglottis regiomontana Britton & Rose, 1928 |
| Leptoglottis subinermis (S. Watson) Britton & Rose, 1928 |
| Leptolobium Vogel, 1837 |
| Leptolobium panamense (Benth.) Sch. Rodr. & A.M.G. Azevedo, 2008 |
| Leptorhizae Krukoff, 1974 |
| Leptospron (Benth.) A. Delgado, 2011 |
| Leptospron Benth., 1865 |
| Leptospron adenanthum (G. Mey.) A. Delgado, 2011 |
| Leptospron gentryi (Standl.) A. Delgado, 2011 |
| Lespedeza Michx., 1803 |
| Lespedeza cuneata (Dum. Cours.) G. Don, 1832 |
| Lespedeza juncea (L. f.) Pers., 1807 |
| Lespedeza juncea var. sericea F.B. Forbes & Hemsl., 1887 |