| [15793] Nitzschia lacunicola | Appellations de Taxon | 15793 |
| [15794] Navicula londonensis | Appellations de Taxon | 15794 |
| [15795] Nitzschia longa | Appellations de Taxon | 15795 |
| [15796] Navicula lambda var. nipponica | Appellations de Taxon | 15796 |
| [15797] Nitzschia linkei | Appellations de Taxon | 15797 |
| [15798] Navicula lapsa | Appellations de Taxon | 15798 |
| [15799] Nitzschia lamprocampa | Appellations de Taxon | 15799 |
| [158] Dinocras megacephala | Appellations de Taxon | 158 |
| [15800] Navicula lepidula | Appellations de Taxon | 15800 |
| [15801] Navicula lapila | Appellations de Taxon | 15801 |
| [15802] Navicula lapila | Appellations de Taxon | 15802 |
| [15803] Navicula spuria | Appellations de Taxon | 15803 |
| [15804] Navicula subprocera | Appellations de Taxon | 15804 |
| [15805] Navicula laticeps | Appellations de Taxon | 15805 |
| [15806] Nitzschia latens | Appellations de Taxon | 15806 |
| [15807] Nitzschia littoralis var. tergestina | Appellations de Taxon | 15807 |
| [15808] Navicula lunula | Appellations de Taxon | 15808 |
| [15809] Navicula lineola var. lineola | Appellations de Taxon | 15809 |
| [1581] Poa annua | Appellations de Taxon | 1581 |
| [15810] Navicula lanceolata var. nipponica | Appellations de Taxon | 15810 |
| [15811] Navicula lanceolata abnormal form | Appellations de Taxon | 15811 |
| [15812] Nitzschia longicollum | Appellations de Taxon | 15812 |
| [15813] Navicula lohmannii | Appellations de Taxon | 15813 |
| [15814] Navicula loibl-sittlerii | Appellations de Taxon | 15814 |
| [15815] Navicula longa | Appellations de Taxon | 15815 |
| [15816] Navicula lineola var. perlepida | Appellations de Taxon | 15816 |
| [15817] Navicula leptostigma | Appellations de Taxon | 15817 |
| [15818] Navicula lateropunctata | Appellations de Taxon | 15818 |
| [15819] Navicula lineola var. irregularis | Appellations de Taxon | 15819 |
| [1582] Poa palustris | Appellations de Taxon | 1582 |
| [15820] Navicula lyrella | Appellations de Taxon | 15820 |
| [15821] Navicula lorenzii | Appellations de Taxon | 15821 |
| [15822] Nitzschia lucisensibilis | Appellations de Taxon | 15822 |
| [15823] Navicula lesothensis | Appellations de Taxon | 15823 |
| [15824] Neidium latum | Appellations de Taxon | 15824 |
| [15825] Navicula litoris | Appellations de Taxon | 15825 |
| [15826] Navicula lunatapicalis | Appellations de Taxon | 15826 |
| [15828] Navicula lubetii(Cocconeiopsis) | Appellations de Taxon | 15828 |
| [15829] Navicula ludloviana | Appellations de Taxon | 15829 |
| [1583] Poa trivialis | Appellations de Taxon | 1583 |
| [15830] Navicula luisii | Appellations de Taxon | 15830 |
| [15831] Neidiopsis levanderi var. tatrensis | Appellations de Taxon | 15831 |
| [15832] Navicula lyra var. constricta | Appellations de Taxon | 15832 |
| [15833] Nitzschia lorenziana var. incerta | Appellations de Taxon | 15833 |
| [15834] Nitzschia luzonensis | Appellations de Taxon | 15834 |
| [15835] Nitzschia lorenziana var. subrecta | Appellations de Taxon | 15835 |
| [15836] Nitzschia lorenziana var. incurva | Appellations de Taxon | 15836 |
| [15837] Navicula maculata | Appellations de Taxon | 15837 |
| [15838] Nitzschia mahoodii | Appellations de Taxon | 15838 |
| [15839] Navicula marina var. constricta | Appellations de Taxon | 15839 |