Gattungen assoziierter Organismen: Ianthe [2 Taxa], Ibatia [2 Taxa], Iberis [34 Taxa], Icerya [6 Taxa], Ichnanthus [50 Taxa], Ichnaspis [1 Taxon], Ichnocarpus [20 Taxa], Ichthyomethia [2 Taxa], Icica [8 Taxa], Idesia [4 Taxa], Idiocerus [1 Taxon], Idioscopus [12 Taxa], Idriella [12 Taxa], Iguanura [3 Taxa], Ilex [509 Taxa], Illicium [7 Taxa], Illigera [1 Taxon], Illosporium [15 Taxa], Ilysanthes [1 Taxon], Immotthia [2 Taxa], Impatiens [254 Taxa], Imperata [110 Taxa], Incrupila [1 Taxon], Indarbela [1 Taxon], Indigofera [349 Taxa], Inga [537 Taxa], Inocarpus [1 Taxon], Inocybe [3 Taxa], Insertia [1 Taxon], Intercalarispora [22 Taxa], Inula [279 Taxa], Iochroma [3 Taxa], Iodina [1 Taxon], Iodophanus [3 Taxa], Ionomidotis [2 Taxa], Ionophragmium [2 Taxa], Ionopsis [5 Taxa], Ioxylon [1 Taxon], Ipecacuanha [1 Taxon], Iphigenia [1 Taxon], Ipomoea [1067 Taxa], Ips [7 Taxa], Irene [12 Taxa], Irenopsis [174 Taxa], Iresine [79 Taxa], Iriartea [6 Taxa], Iris [203 Taxa], Irlbachia [12 Taxa], Irpex [1 Taxon], Irvingia [1 Taxon], Isachne [15 Taxa], Isanthera [1 Taxon], Isaria [8 Taxa], Isariopsis [1 Taxon], Isatis [11 Taxa], Ischaemum [38 Taxa], Ischnapsis [2 Taxa], Ischnaspis [2 Taxa], Ischnoderma [3 Taxa], Ischnoptera [1 Taxon], Ischnosiphon [9 Taxa], Iseilema [12 Taxa], Isertia [10 Taxa], Isipinga [3 Taxa], Isoachlya [2 Taxa], Isoberlinia [1 Taxon], Isoglossa [42 Taxa], Isoloma [2 Taxa], Isonandra [1 Taxon], Isopogon [1 Taxon], Isopyrum [11 Taxa], Isotoma [2 Taxa], Isthmiella [5 Taxa], Isthmospora [12 Taxa], Itea [11 Taxa], Iva [1 Taxon], Ixeris [2 Taxa], Ixia [14 Taxa], Ixodia [2 Taxa], Ixora [146 Taxa]