| [1584] Hydrocharitaceae | Appellations de Taxon | 1584 |
| [15840] Navicula maeotica | Appellations de Taxon | 15840 |
| [15841] Navicula mauriciana | Appellations de Taxon | 15841 |
| [15842] Nitzschia maxima | Appellations de Taxon | 15842 |
| [15843] Navicula mayeri var. typica | Appellations de Taxon | 15843 |
| [15844] Navicula mutica var. binodis | Appellations de Taxon | 15844 |
| [15845] Nitzschia macera | Appellations de Taxon | 15845 |
| [15846] Navicula mediocostata | Appellations de Taxon | 15846 |
| [15847] Navicula mucronata | Appellations de Taxon | 15847 |
| [15848] Navicula microlyra | Appellations de Taxon | 15848 |
| [15849] Navicula menda | Appellations de Taxon | 15849 |
| [1585] Elodea | Appellations de Taxon | 1585 |
| [15850] Nitzschia medioconstricta | Appellations de Taxon | 15850 |
| [15851] Navicula maeandrinoides | Appellations de Taxon | 15851 |
| [15852] Nitzschia machardyae | Appellations de Taxon | 15852 |
| [15853] Navicula meadensis | Appellations de Taxon | 15853 |
| [15854] Navicula meisteri | Appellations de Taxon | 15854 |
| [15855] Navicula menisculus var. obtusa | Appellations de Taxon | 15855 |
| [15856] Navicula mereschkowskii | Appellations de Taxon | 15856 |
| [15857] Navicula melanesica | Appellations de Taxon | 15857 |
| [15858] Navicula menisculus abnormal form | Appellations de Taxon | 15858 |
| [15859] Navicula meyeri | Appellations de Taxon | 15859 |
| [1586] Elodea canadensis | Appellations de Taxon | 1586 |
| [15860] Navicula moenofranconica | Appellations de Taxon | 15860 |
| [15861] Navicula megacuspidata | Appellations de Taxon | 15861 |
| [15862] Navicula mugadensis | Appellations de Taxon | 15862 |
| [15863] Navicula margaritifera | Appellations de Taxon | 15863 |
| [15864] Navicula mutica var. gibbula | Appellations de Taxon | 15864 |
| [15865] Nitzschia marginata | Appellations de Taxon | 15865 |
| [15867] Navicula lupula | Appellations de Taxon | 15867 |
| [15868] Navicula lurinda | Appellations de Taxon | 15868 |
| [15869] Navicula lusoria | Appellations de Taxon | 15869 |
| [15870] Navicula lunata | Appellations de Taxon | 15870 |
| [15871] Navicula ludloviana var. unilateralis | Appellations de Taxon | 15871 |
| [15872] Navicula luxoriensis | Appellations de Taxon | 15872 |
| [15873] Nitzschia laevissima | Appellations de Taxon | 15873 |
| [15874] Navicula madeirensis | Appellations de Taxon | 15874 |
| [15875] Navicula maeandriana | Appellations de Taxon | 15875 |
| [15876] Navicula microdigitoradiata abnormal form | Appellations de Taxon | 15876 |
| [15877] Navicula magnifica | Appellations de Taxon | 15877 |
| [15878] Nitzschia mahihaensis | Appellations de Taxon | 15878 |
| [15879] Nitzschia maillardii | Appellations de Taxon | 15879 |
| [1588] Elodea nuttalii | Appellations de Taxon | 1588 |
| [15880] Navicula malica | Appellations de Taxon | 15880 |
| [15881] Navicula mannii | Appellations de Taxon | 15881 |
| [15882] Navicula microrhombus | Appellations de Taxon | 15882 |
| [15883] Navicula muciculoides | Appellations de Taxon | 15883 |
| [15884] Navicula microdicta | Appellations de Taxon | 15884 |
| [15885] Navicula microrhynchus | Appellations de Taxon | 15885 |
| [15886] Navicula mucicola | Appellations de Taxon | 15886 |