| Limnetis cynosuroides (L.) Rich., 1805 |
| Limnetis glabra (Muhl. ex Elliott) Eaton & Wright, 1840 |
| Limnetis glomerata (L.) Eaton, 1817 |
| Limnetis polystachia (Michx.) Rich., 1805 |
| Limnodea L.H. Dewey, 1894 |
| Limnodea arkansana (Nutt.) L.H. Dewey, 1894 |
| Limnodea arkansana var. pilosa (Trin.) Scribn., 1900 |
| Lingnania McClure, 1940 |
| Lithachne P. Beauv., 1812 |
| Lithachne axillaris P. Beauv., 1812 |
| Lithachne pauciflora (Sw.) P. Beauv., 1812 |
| Lithagrostis Gaertn., 1788 |
| Lithagrostis lacryma-jobi (L.) Gaertn., 1788 |
| Lodicularia P. Beauv., 1812 |
| Lodicularia capensis (Trin.) Nees, 1841 |
| Lodicularia fasciculata (Lam.) P. Beauv., 1812 |
| Lodicularia peruviana Nees ex Meyen, 1834 |
| Loliinae Dumort., 1829 |
| Lolium L., 1753 |
| Lolium aristatum Lag., 1816 |