| [13239] Eunotia rabenhorstii | Appellations de Taxon | 13239 |
| [1324] Schistidium | Appellations de Taxon | 1324 |
| [13240] Eunotia rabenhorstii var. triodon | Appellations de Taxon | 13240 |
| [13241] Encyonopsis reichardtii | Appellations de Taxon | 13241 |
| [13242] Encyonopsis radialis | Appellations de Taxon | 13242 |
| [13243] Encyonopsis recta | Appellations de Taxon | 13243 |
| [13244] Eunotia reedii | Appellations de Taxon | 13244 |
| [13245] Eunotia rhynchocephala var. rhynchocephala | Appellations de Taxon | 13245 |
| [13246] Encyonema rifelanum | Appellations de Taxon | 13246 |
| [13247] Encyonema riotecense | Appellations de Taxon | 13247 |
| [13248] Eunotia reflexa f. minor | Appellations de Taxon | 13248 |
| [13249] Eunotia rostellata | Appellations de Taxon | 13249 |
| [1325] Schistidium agassizii | Appellations de Taxon | 1325 |
| [13250] Eunotia rhynchocephala var. satelles | Appellations de Taxon | 13250 |
| [13252] Epithemia sorex var. acuta | Appellations de Taxon | 13252 |
| [13253] Encyonema silesiacum var. altensis | Appellations de Taxon | 13253 |
| [13254] Eunotia sarraceniae | Appellations de Taxon | 13254 |
| [13255] Eunotia satelles | Appellations de Taxon | 13255 |
| [13256] Eunotia serra-australis | Appellations de Taxon | 13256 |
| [13257] Entomoneis pulchra | Appellations de Taxon | 13257 |
| [13258] Eunotia pectinalis var. undulata f. triodon | Appellations de Taxon | 13258 |
| [13259] Eunotia pseudovalida | Appellations de Taxon | 13259 |
| [13260] Eunotia pexii | Appellations de Taxon | 13260 |
| [13261] Eunotia pyramidata | Appellations de Taxon | 13261 |
| [13262] Eunotia quaternaria | Appellations de Taxon | 13262 |
| [13263] Eunotia reflexa f. reflexa | Appellations de Taxon | 13263 |
| [13264] Eunotia rabenhorstiana var. elongata | Appellations de Taxon | 13264 |
| [13265] Eunotia repens | Appellations de Taxon | 13265 |
| [13266] Epithemia reticulata | Appellations de Taxon | 13266 |
| [13267] Encyonopsis reviersiana | Appellations de Taxon | 13267 |
| [13268] Ethmodiscus rex | Appellations de Taxon | 13268 |
| [13269] Eolimna rhombica | Appellations de Taxon | 13269 |
| [1327] Schistidium rivulare | Appellations de Taxon | 1327 |
| [13270] Eunotia roland-schmidtii | Appellations de Taxon | 13270 |
| [13271] Eolimna ruttneri | Appellations de Taxon | 13271 |
| [13272] Encyonema rugosiforme | Appellations de Taxon | 13272 |
| [13273] Encyonema rugosum | Appellations de Taxon | 13273 |
| [13274] Encyonema rumrichae | Appellations de Taxon | 13274 |
| [13275] Encyonopsis ruttnerii var. obtusa | Appellations de Taxon | 13275 |
| [13276] Encyonopsis ruttnerii | Appellations de Taxon | 13276 |
| [13277] Eunotia ruzickae | Appellations de Taxon | 13277 |
| [13278] Encyonopsis subcapitata | Appellations de Taxon | 13278 |
| [13279] Encyonema subgracile | Appellations de Taxon | 13279 |
| [1328] Hookeriaceae | Appellations de Taxon | 1328 |
| [13280] Eunotia sudetica var. bidens | Appellations de Taxon | 13280 |
| [13281] Eolimna subminuscula | Appellations de Taxon | 13281 |
| [13282] Encyonopsis speciosa | Appellations de Taxon | 13282 |
| [13283] Epithemia sorex var. perundulata | Appellations de Taxon | 13283 |
| [13284] Eunotia spiculaeformis | Appellations de Taxon | 13284 |
| [13285] Encyonema supergracile | Appellations de Taxon | 13285 |