| [15006] Navicula bottnica | Appellations de Taxon | 15006 |
| [15007] Navicula bourrellyi | Appellations de Taxon | 15007 |
| [15008] Navicula bourrellyivera | Appellations de Taxon | 15008 |
| [15009] Navicula borowkae | Appellations de Taxon | 15009 |
| [1501] Cyperus rotundus | Appellations de Taxon | 1501 |
| [15010] Navicula boyei | Appellations de Taxon | 15010 |
| [15011] Navicula bryophila var. paucistriata | Appellations de Taxon | 15011 |
| [15012] Navicymbula pusilla var. lata | Appellations de Taxon | 15012 |
| [15013] Nitzschia bifurcata | Appellations de Taxon | 15013 |
| [15014] Nitzschia bilobata var. minor | Appellations de Taxon | 15014 |
| [15015] Navicula bintila | Appellations de Taxon | 15015 |
| [15016] Navicula bipustulata | Appellations de Taxon | 15016 |
| [15017] Navicula bituminosa | Appellations de Taxon | 15017 |
| [15018] Navicula blazencicae | Appellations de Taxon | 15018 |
| [15019] Naviculadicta bremensiformis | Appellations de Taxon | 15019 |
| [1502] Cyperus serotinus | Appellations de Taxon | 1502 |
| [15020] Neidium bisulcatum var. nipponicum | Appellations de Taxon | 15020 |
| [15021] Nitzschia brunoi | Appellations de Taxon | 15021 |
| [15022] Navicula bolleana | Appellations de Taxon | 15022 |
| [15023] Navicula borneoensis | Appellations de Taxon | 15023 |
| [15024] Navicymbula pusilla var. rotundata | Appellations de Taxon | 15024 |
| [15025] Nitzschia barbieri | Appellations de Taxon | 15025 |
| [15026] Navicula bruchii | Appellations de Taxon | 15026 |
| [15027] Navicula brehmii | Appellations de Taxon | 15027 |
| [15028] Navicula brasiliana | Appellations de Taxon | 15028 |
| [15029] Navicula brunii | Appellations de Taxon | 15029 |
| [1503] Eleocharis | Appellations de Taxon | 1503 |
| [15030] Neidium bisulcatum var. subundulatum | Appellations de Taxon | 15030 |
| [15031] Navicula breitenbuchii | Appellations de Taxon | 15031 |
| [15032] Nitzschia brevissima abnormal form | Appellations de Taxon | 15032 |
| [15033] Nitzschia brittonii | Appellations de Taxon | 15033 |
| [15034] Navicula bouillantensis | Appellations de Taxon | 15034 |
| [15035] Navicula broetzii | Appellations de Taxon | 15035 |
| [15036] Nitzschia buceros | Appellations de Taxon | 15036 |
| [15037] Navicula bulgariarum | Appellations de Taxon | 15037 |
| [15038] Navicula clementis var. acuta | Appellations de Taxon | 15038 |
| [15039] Navicula calida | Appellations de Taxon | 15039 |
| [1504] Eleocharis acicularis | Appellations de Taxon | 1504 |
| [15040] Navicula caenosus | Appellations de Taxon | 15040 |
| [15041] Navicula carinifera | Appellations de Taxon | 15041 |
| [15042] Navicula catalanogermanica abnormal form | Appellations de Taxon | 15042 |
| [15043] Navicula carteri | Appellations de Taxon | 15043 |
| [15044] Navicula carvajaliana | Appellations de Taxon | 15044 |
| [15045] Navicula concinna | Appellations de Taxon | 15045 |
| [15046] Navicula concilians | Appellations de Taxon | 15046 |
| [15047] Navicula concamerata | Appellations de Taxon | 15047 |
| [15048] Navicula coccinella | Appellations de Taxon | 15048 |
| [15049] Neidium cape-codense | Appellations de Taxon | 15049 |
| [1505] Eleocharis multicaulis | Appellations de Taxon | 1505 |
| [15050] Navicula cryptocephaloides | Appellations de Taxon | 15050 |