Associated organism genera: 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]