| [13812] Gomphonema cumrhis | Appellations de Taxon | 13812 |
| [13813] Gomphonema cuneolus | Appellations de Taxon | 13813 |
| [13814] Gomphonema curvipedatum | Appellations de Taxon | 13814 |
| [13815] Gomphonema archaevibrio | Appellations de Taxon | 13815 |
| [13816] Gomphonema abbreviatum var. sphenelloides | Appellations de Taxon | 13816 |
| [13817] Gomphonema astridae | Appellations de Taxon | 13817 |
| [13818] Gomphonema acuminatum var. tibetium | Appellations de Taxon | 13818 |
| [13819] Gomphonema acuminatum var. trigonocephala | Appellations de Taxon | 13819 |
| [1382] Equisetaceae | Appellations de Taxon | 1382 |
| [13820] Grammatophora gibberula | Appellations de Taxon | 13820 |
| [13821] Geissleria bourbonensis | Appellations de Taxon | 13821 |
| [13822] Gyrosigma balticum var. californicum | Appellations de Taxon | 13822 |
| [13823] Gomphonema berggrenii | Appellations de Taxon | 13823 |
| [13824] Gomphonema biceps | Appellations de Taxon | 13824 |
| [13825] Gomphonema blandiculum | Appellations de Taxon | 13825 |
| [13826] Gomphonema bourbonense | Appellations de Taxon | 13826 |
| [13827] Gomphonema brebissonii | Appellations de Taxon | 13827 |
| [13828] Gomphonema bergeri | Appellations de Taxon | 13828 |
| [13829] Gomphonema butantanum | Appellations de Taxon | 13829 |
| [1383] Equisetum | Appellations de Taxon | 1383 |
| [13830] Gomphonema camburnii | Appellations de Taxon | 13830 |
| [13831] Gomphonema cathedrale | Appellations de Taxon | 13831 |
| [13833] Gomphonema clava | Appellations de Taxon | 13833 |
| [13834] Gomphonema capitatum var. macilentum | Appellations de Taxon | 13834 |
| [13835] Giffenia cocconeiformis | Appellations de Taxon | 13835 |
| [13836] Gomphonema coronatum | Appellations de Taxon | 13836 |
| [13837] Gomphonema costei | Appellations de Taxon | 13837 |
| [13838] Gomphonema crassicingulatum | Appellations de Taxon | 13838 |
| [13839] Geissleria creolorum | Appellations de Taxon | 13839 |
| [1384] Equisetum arvense | Appellations de Taxon | 1384 |
| [13840] Geissleria cummerowi | Appellations de Taxon | 13840 |
| [13841] Gomphonema clavatulum | Appellations de Taxon | 13841 |
| [13842] Gomphonema daphnoides | Appellations de Taxon | 13842 |
| [13843] Geissleria declivis | Appellations de Taxon | 13843 |
| [13844] Gomphonema delicatula | Appellations de Taxon | 13844 |
| [13845] Gomphonema demerarae | Appellations de Taxon | 13845 |
| [13846] Gomphonema duplipunctatum | Appellations de Taxon | 13846 |
| [13847] Gomphonema dichotomum var. vibrio f. attenuatum | Appellations de Taxon | 13847 |
| [13848] Gomphoneis eriense var. angularis | Appellations de Taxon | 13848 |
| [13849] Gomphoneis eriense var. apiculata | Appellations de Taxon | 13849 |
| [1385] Equisetum fluviatile | Appellations de Taxon | 1385 |
| [13850] Gomphoneis eriense var. canadensis | Appellations de Taxon | 13850 |
| [13851] Geissleria hustedtii | Appellations de Taxon | 13851 |
| [13852] Geissleria lateropunctata | Appellations de Taxon | 13852 |
| [13853] Gomphonema epiphanes | Appellations de Taxon | 13853 |
| [13854] Gomphonema equadorianum | Appellations de Taxon | 13854 |
| [13855] Gomphoneis eriensis | Appellations de Taxon | 13855 |
| [13856] Gomphoneis eriense var. rostrata | Appellations de Taxon | 13856 |
| [13857] Gomphonema exilissimum abnormal form | Appellations de Taxon | 13857 |
| [13858] Gyrosigma euhippus | Appellations de Taxon | 13858 |