| [15141] Navicula corticola | Appellations de Taxon | 15141 |
| [15142] Navicula contentaeformis | Appellations de Taxon | 15142 |
| [15143] Navicula cryptotenella abnormal form | Appellations de Taxon | 15143 |
| [15144] Navicula cluthensoides | Appellations de Taxon | 15144 |
| [15146] Navicula cuspidata var. major | Appellations de Taxon | 15146 |
| [15147] Navicula cunctans | Appellations de Taxon | 15147 |
| [15148] Navicula cuspidata var. obtusa | Appellations de Taxon | 15148 |
| [15149] Navicula cuspis | Appellations de Taxon | 15149 |
| [1515] Scirpus | Appellations de Taxon | 1515 |
| [15150] Navicula curiosa | Appellations de Taxon | 15150 |
| [15151] Navicula cuvella | Appellations de Taxon | 15151 |
| [15152] Navicula convergens | Appellations de Taxon | 15152 |
| [15153] Naviculadicta angustata | Appellations de Taxon | 15153 |
| [15154] Nitzschia dakariensis | Appellations de Taxon | 15154 |
| [15155] Navicula damasii | Appellations de Taxon | 15155 |
| [15156] Nitzschia denticula f. ancyli | Appellations de Taxon | 15156 |
| [15157] Nitzschia dubia var. australis | Appellations de Taxon | 15157 |
| [15158] Nitzschia dubiiformis | Appellations de Taxon | 15158 |
| [15159] Nitzschia droebakensis | Appellations de Taxon | 15159 |
| [1516] Scirpus acicularis | Appellations de Taxon | 1516 |
| [15160] Navicula diabolica | Appellations de Taxon | 15160 |
| [15161] Nitzschia decipiens | Appellations de Taxon | 15161 |
| [15162] Neidium decens | Appellations de Taxon | 15162 |
| [15163] Navicula decussata | Appellations de Taxon | 15163 |
| [15164] Navicula digitoradiata var. cyprinus | Appellations de Taxon | 15164 |
| [15165] Naviculadicta diahotana | Appellations de Taxon | 15165 |
| [15166] Neidium distinguendum | Appellations de Taxon | 15166 |
| [15167] Naviculadicta geisslerae | Appellations de Taxon | 15167 |
| [15168] Navicula digitoradiata f. linearis | Appellations de Taxon | 15168 |
| [15169] Naviculadicta digituloides | Appellations de Taxon | 15169 |
| [1517] Scirpus caespitosus | Appellations de Taxon | 1517 |
| [15170] Navicula diengensis | Appellations de Taxon | 15170 |
| [15171] Naviculadicta digitulus | Appellations de Taxon | 15171 |
| [15172] Naviculadicta hambergii | Appellations de Taxon | 15172 |
| [15173] Navicula cascadensis | Appellations de Taxon | 15173 |
| [15174] Navicula costei | Appellations de Taxon | 15174 |
| [15175] Navicula complanata var. subinflata | Appellations de Taxon | 15175 |
| [15176] Nitzschia consummata | Appellations de Taxon | 15176 |
| [15177] Navicula clarensiana | Appellations de Taxon | 15177 |
| [15178] Navicula cursoria | Appellations de Taxon | 15178 |
| [15179] Navicula crassirostris | Appellations de Taxon | 15179 |
| [15180] Navicula consentanea | Appellations de Taxon | 15180 |
| [15181] Nitzschia capitellata var. tenuirostris | Appellations de Taxon | 15181 |
| [15182] Neidium constrictum | Appellations de Taxon | 15182 |
| [15184] Navicula cuspidata var. alpestris | Appellations de Taxon | 15184 |
| [15185] Nitzschia cucumis | Appellations de Taxon | 15185 |
| [15186] Nitzschia curvirostris | Appellations de Taxon | 15186 |
| [15187] Navicula cruxmeridionalis | Appellations de Taxon | 15187 |
| [15188] Navicula cymbelloides | Appellations de Taxon | 15188 |
| [15189] Navicula claytoni | Appellations de Taxon | 15189 |