| [1552] Calamagrostis | Appellations de Taxon | 1552 |
| [15520] Nitzschia grandis | Appellations de Taxon | 15520 |
| [15521] Nitzschia granii | Appellations de Taxon | 15521 |
| [15522] Nitzschia gruendleri | Appellations de Taxon | 15522 |
| [15523] Navicula garkeana | Appellations de Taxon | 15523 |
| [15524] Navicula gastrum var. remotestriata | Appellations de Taxon | 15524 |
| [15525] Navicula granii | Appellations de Taxon | 15525 |
| [15526] Navigiolum spinosissimum | Appellations de Taxon | 15526 |
| [15527] Navicula gregaria abnormal form | Appellations de Taxon | 15527 |
| [15528] Nitzschia geitleri | Appellations de Taxon | 15528 |
| [15529] Navicula gigantorum | Appellations de Taxon | 15529 |
| [1553] Calamagrostis epigejos | Appellations de Taxon | 1553 |
| [15530] Navicula gratissima | Appellations de Taxon | 15530 |
| [15531] Nitzschia goetzeana | Appellations de Taxon | 15531 |
| [15532] Nitzschia guineensis | Appellations de Taxon | 15532 |
| [15533] Navicula guluensis | Appellations de Taxon | 15533 |
| [15534] Navicula hawaiensis | Appellations de Taxon | 15534 |
| [15535] Navicula hennedyi f. bacillifera | Appellations de Taxon | 15535 |
| [15536] Navicula homburgiana | Appellations de Taxon | 15536 |
| [15537] Neidium hercynicum f. bogosoensis | Appellations de Taxon | 15537 |
| [15538] Nitzschia habishawii | Appellations de Taxon | 15538 |
| [15539] Navicula herbstiae | Appellations de Taxon | 15539 |
| [1554] Catabrosa | Appellations de Taxon | 1554 |
| [15540] Navicula hanseatica ssp. circumarctica | Appellations de Taxon | 15540 |
| [15541] Navicula hasta var. gracilis | Appellations de Taxon | 15541 |
| [15542] Navicula hennedyi f. granulata | Appellations de Taxon | 15542 |
| [15543] Navicula hilliardi | Appellations de Taxon | 15543 |
| [15544] Navicula hintzii | Appellations de Taxon | 15544 |
| [15545] Nitzschia hierosolymitana | Appellations de Taxon | 15545 |
| [15546] Navicula h-album | Appellations de Taxon | 15546 |
| [15547] Navicula helensoides | Appellations de Taxon | 15547 |
| [15548] Navicula horstii | Appellations de Taxon | 15548 |
| [15549] Navicula halophila var. subcapitata | Appellations de Taxon | 15549 |
| [1555] Catabrosa aquatica | Appellations de Taxon | 1555 |
| [15550] Nanoneis haslae | Appellations de Taxon | 15550 |
| [15551] Neidium hercynicum f. subrostratum | Appellations de Taxon | 15551 |
| [15552] Navicula hustedtiana | Appellations de Taxon | 15552 |
| [15553] Navicula heteroflexa | Appellations de Taxon | 15553 |
| [15554] Navicula grippii(Petroneis) | Appellations de Taxon | 15554 |
| [15555] Navicula gelida var. radissonii | Appellations de Taxon | 15555 |
| [15556] Nitzschia grunowii | Appellations de Taxon | 15556 |
| [15557] Nitzschia grovei | Appellations de Taxon | 15557 |
| [15558] Neidium grunowii | Appellations de Taxon | 15558 |
| [15559] Navigiolum sardiniense | Appellations de Taxon | 15559 |
| [1556] Deschampsia | Appellations de Taxon | 1556 |
| [15560] Navicula gurovii | Appellations de Taxon | 15560 |
| [15561] Navicula guttata | Appellations de Taxon | 15561 |
| [15562] Navicula grevillei | Appellations de Taxon | 15562 |
| [15563] Nitzschia gyrosigma | Appellations de Taxon | 15563 |
| [15564] Navicula halinae | Appellations de Taxon | 15564 |