| [1855] Ludwigia palustris | Appellations de Taxon | 1855 |
| [18550] Stenopterobia pelagica | Appellations de Taxon | 18550 |
| [18551] Spumorbis fasciculatus | Appellations de Taxon | 18551 |
| [18552] Surirella panganiensis | Appellations de Taxon | 18552 |
| [18553] Stauroneis pergracilis | Appellations de Taxon | 18553 |
| [18554] Stauroneis phoenicenteron f. gracilis | Appellations de Taxon | 18554 |
| [18555] Stauroneis phoenicenteron f. angulata | Appellations de Taxon | 18555 |
| [18556] Stauroneis phylloides var. intermedia | Appellations de Taxon | 18556 |
| [18557] Stenoneis obtuserostrata | Appellations de Taxon | 18557 |
| [18558] Surirella ovalis var. brightwellii | Appellations de Taxon | 18558 |
| [18559] Surirella oestrupi | Appellations de Taxon | 18559 |
| [1856] Ludwigia peploides | Appellations de Taxon | 1856 |
| [18560] Sellaphora ohridana | Appellations de Taxon | 18560 |
| [18561] Staurosirella oldenburgiana | Appellations de Taxon | 18561 |
| [18562] Surirella oliffi | Appellations de Taxon | 18562 |
| [18563] Surirella olungensis | Appellations de Taxon | 18563 |
| [18564] Stauroneis olympica | Appellations de Taxon | 18564 |
| [18565] Surirella ovulum | Appellations de Taxon | 18565 |
| [18566] Surirella ovalis var. maxima | Appellations de Taxon | 18566 |
| [18567] Stauroneis pachycephala | Appellations de Taxon | 18567 |
| [18568] Sellaphora paenepupula | Appellations de Taxon | 18568 |
| [18569] Stauroneis phoenicenteron var. amphilepta | Appellations de Taxon | 18569 |
| [1857] Ludwigia uruguayensis | Appellations de Taxon | 1857 |
| [18570] Stauroneis panduriformis | Appellations de Taxon | 18570 |
| [18571] Surirella papillifera | Appellations de Taxon | 18571 |
| [18572] Staurosira pseudoconstruens var. trigona | Appellations de Taxon | 18572 |
| [18573] Stauroneis pseudagrestis | Appellations de Taxon | 18573 |
| [18574] Surirella pandura var. delicata | Appellations de Taxon | 18574 |
| [18575] Stauroneis pseudomuriella | Appellations de Taxon | 18575 |
| [18576] Surirella pseudomargaritifera | Appellations de Taxon | 18576 |
| [18577] Surirella pseudovalis | Appellations de Taxon | 18577 |
| [18578] Staurophora rossii | Appellations de Taxon | 18578 |
| [18579] Staurophora salina | Appellations de Taxon | 18579 |
| [1858] Plantaginaceae | Appellations de Taxon | 1858 |
| [18580] Stauroneis phylloides | Appellations de Taxon | 18580 |
| [18581] Stictodiscus picus | Appellations de Taxon | 18581 |
| [18582] Spinivinculum directum | Appellations de Taxon | 18582 |
| [18583] Spinivinculum sapiens | Appellations de Taxon | 18583 |
| [18584] Stauroneis perminuta | Appellations de Taxon | 18584 |
| [18585] Stauroneis phylloides var. obtusa | Appellations de Taxon | 18585 |
| [18586] Stauroneis polynesiae | Appellations de Taxon | 18586 |
| [18587] Stephanopyxis palmeriana | Appellations de Taxon | 18587 |
| [18588] Surirella propinqua | Appellations de Taxon | 18588 |
| [18589] Stephanopyxis splendidus | Appellations de Taxon | 18589 |
| [1859] Littorella | Appellations de Taxon | 1859 |
| [18590] Sellaphora pseudopupula | Appellations de Taxon | 18590 |
| [18591] Stauroneis pseudothermicola | Appellations de Taxon | 18591 |
| [18592] Sellaphora pupula var. subcapitata | Appellations de Taxon | 18592 |
| [18593] Spatangidium arachne | Appellations de Taxon | 18593 |
| [18594] Stauroneis partabgarhensis | Appellations de Taxon | 18594 |