| [18366] Shionodiscus poroseriatus | Appellations de Taxon | 18366 |
| [18367] Shionodiscus variantius | Appellations de Taxon | 18367 |
| [18368] Stauroneis husvikensis | Appellations de Taxon | 18368 |
| [18369] Shionodiscus voeringensis | Appellations de Taxon | 18369 |
| [1837] Nymphaeaceae | Appellations de Taxon | 1837 |
| [18370] Stenoneis inconspicua var. baculus | Appellations de Taxon | 18370 |
| [18371] Staurosirella incognita | Appellations de Taxon | 18371 |
| [18372] Stenopterobia intermedia var. crassior | Appellations de Taxon | 18372 |
| [18373] Staurosira incerta | Appellations de Taxon | 18373 |
| [18374] Stauroforma inermis | Appellations de Taxon | 18374 |
| [18375] Sextiputeus inornatus | Appellations de Taxon | 18375 |
| [18376] Stenopterobia intermedia f. subacuta | Appellations de Taxon | 18376 |
| [18377] Spinivinculum inzensis | Appellations de Taxon | 18377 |
| [18378] Surirella islandica | Appellations de Taxon | 18378 |
| [18379] Stauroneis intricans | Appellations de Taxon | 18379 |
| [1838] Nuphar | Appellations de Taxon | 1838 |
| [18380] Surirella intercedens | Appellations de Taxon | 18380 |
| [18381] Surirella interrupta | Appellations de Taxon | 18381 |
| [18382] Surirella kapitiana | Appellations de Taxon | 18382 |
| [18383] Surirella kattrayi | Appellations de Taxon | 18383 |
| [18384] Skeletonemopsis barbadense | Appellations de Taxon | 18384 |
| [18385] Skeletonemopsis crawfordii | Appellations de Taxon | 18385 |
| [18386] Skeletonema grevillei | Appellations de Taxon | 18386 |
| [18387] Stephanodiscus khurseviczae | Appellations de Taxon | 18387 |
| [18388] Skeletonemopsis mahoodii | Appellations de Taxon | 18388 |
| [18389] Skeletonema penicillus | Appellations de Taxon | 18389 |
| [1839] Nuphar lutea | Appellations de Taxon | 1839 |
| [18390] Stenopterobia krammeri | Appellations de Taxon | 18390 |
| [18391] Stauroneis krasskei | Appellations de Taxon | 18391 |
| [18392] Skeletonemopsis rugosa | Appellations de Taxon | 18392 |
| [18393] Skeletonemopsis simbirskiana | Appellations de Taxon | 18393 |
| [18394] Shionodiscus ritscheri | Appellations de Taxon | 18394 |
| [18395] Shionodiscus trifultus | Appellations de Taxon | 18395 |
| [18396] Surirella helvetica var. tibetica | Appellations de Taxon | 18396 |
| [18397] Shionodiscus tetraoestrupii var. reimeri | Appellations de Taxon | 18397 |
| [18398] Stenopterobia hullii | Appellations de Taxon | 18398 |
| [18399] Sellaphora hustedtii | Appellations de Taxon | 18399 |
| [184] Hyporhyacophila | Appellations de Taxon | 184 |
| [1840] Nuphar pumila | Appellations de Taxon | 1840 |
| [18400] Surirella inducta | Appellations de Taxon | 18400 |
| [18401] Simonsenia delognei abnormal form | Appellations de Taxon | 18401 |
| [18402] Surirella ignota | Appellations de Taxon | 18402 |
| [18403] Synedra inequalis var. jumlensis | Appellations de Taxon | 18403 |
| [18404] Sellaphora illustris | Appellations de Taxon | 18404 |
| [18405] Staurosira inflatissima | Appellations de Taxon | 18405 |
| [18406] Sellaphora japonica | Appellations de Taxon | 18406 |
| [18407] Stauroneis jarensis | Appellations de Taxon | 18407 |
| [18408] Surirella jenneri | Appellations de Taxon | 18408 |
| [18409] Stauroneis joignerezii | Appellations de Taxon | 18409 |
| [18410] Staurosira jolinae | Appellations de Taxon | 18410 |