| [16297] Navicula rhynchocephala var. constricta | Appellations de Taxon | 16297 |
| [16298] Navicula rhynchocephala var. leptocephala | Appellations de Taxon | 16298 |
| [16299] Navicula rhynchocephala var. permagna | Appellations de Taxon | 16299 |
| [163] Eoperla ochracea | Appellations de Taxon | 163 |
| [1630] Spirodela polyrhiza | Appellations de Taxon | 1630 |
| [16300] Navicula rhynchocephala var. antiqua | Appellations de Taxon | 16300 |
| [16301] Navicula ricardii | Appellations de Taxon | 16301 |
| [16302] Navicula ramosissima var. mucosa | Appellations de Taxon | 16302 |
| [16303] Neidium roenningii | Appellations de Taxon | 16303 |
| [16304] Navicula robertsiana | Appellations de Taxon | 16304 |
| [16305] Nitzschia rochensis | Appellations de Taxon | 16305 |
| [16306] Navicula rogalli | Appellations de Taxon | 16306 |
| [16307] Navicula rolandii | Appellations de Taxon | 16307 |
| [16308] Nitzschia rorida | Appellations de Taxon | 16308 |
| [16309] Navicula radiosa var. subalpina | Appellations de Taxon | 16309 |
| [1631] Wolffia | Appellations de Taxon | 1631 |
| [16310] Navicula rosenbergii | Appellations de Taxon | 16310 |
| [16311] Navicula resecta | Appellations de Taxon | 16311 |
| [16312] Neidium roland-schmidtii | Appellations de Taxon | 16312 |
| [16313] Navicula rossii (Dickieia) | Appellations de Taxon | 16313 |
| [16314] Nitzschia rautenbachiae | Appellations de Taxon | 16314 |
| [16315] Navicula rudis | Appellations de Taxon | 16315 |
| [16316] Navicula rudiformis | Appellations de Taxon | 16316 |
| [16317] Navicula rugula | Appellations de Taxon | 16317 |
| [16318] Navicula rumaniensis | Appellations de Taxon | 16318 |
| [16319] Navicula rusticensis | Appellations de Taxon | 16319 |
| [1632] Wolffia arrhiza | Appellations de Taxon | 1632 |
| [16320] Navicula recurva | Appellations de Taxon | 16320 |
| [16321] Navicula rivulorum | Appellations de Taxon | 16321 |
| [16322] Navicula rhynchocephaloides | Appellations de Taxon | 16322 |
| [16323] Navicula ridelii | Appellations de Taxon | 16323 |
| [16324] Navicula riediana | Appellations de Taxon | 16324 |
| [16325] Navicula riotecensis | Appellations de Taxon | 16325 |
| [16326] Navicula rivulensis | Appellations de Taxon | 16326 |
| [16327] Navicula ramosissima f. amplia | Appellations de Taxon | 16327 |
| [16328] Navicula ramphoides | Appellations de Taxon | 16328 |
| [16329] Navicula reimeri | Appellations de Taxon | 16329 |
| [1633] Lobeliaceae | Appellations de Taxon | 1633 |
| [16330] Nitzschia reimersenii | Appellations de Taxon | 16330 |
| [16331] Navicula rhaphoneis | Appellations de Taxon | 16331 |
| [16332] Navicula radiosa var. pseudostauron | Appellations de Taxon | 16332 |
| [16333] Navicula repentina | Appellations de Taxon | 16333 |
| [16334] Nitzschia reversa f. parva | Appellations de Taxon | 16334 |
| [16335] Navicula reinhardtii var. rhomboelliptica | Appellations de Taxon | 16335 |
| [16336] Navicula recens abnormal form | Appellations de Taxon | 16336 |
| [16337] Nitzschia rectilonga | Appellations de Taxon | 16337 |
| [16338] Navicula ramosissima var. torquata | Appellations de Taxon | 16338 |
| [16339] Navicula retracta | Appellations de Taxon | 16339 |
| [1634] Lobelia | Appellations de Taxon | 1634 |
| [16340] Nitzschia rectissima | Appellations de Taxon | 16340 |