Iacovielloara (Icvl) = Brassavola x Cattleya x Diacrium x Epidendrum x Laelia
Ichthyostomum (Ich)
Ida (Ida)
Ilonara (Ilo) = Gomesa x Rodriguezia x Tolumnia
Inobulbon (Ino)
Ionettia (Intta) = Comparettia x Ionopsis
Ionocentrum (Ict) = Ionopsis x Trichocentrum
Ionocidium (Incdm) = Ionopsis x Oncidium
Ionopsis (Inps)
Ionumnia (Inm) = Ionopsis x Tolumnia
Ipsea (Ip)
Irvingara (Irv) = Arachnis x Renanthera x Trichoglottis
Isabelia (Isa)
Isaoara (Isr) = Aerides x Ascocentrum x Phalaenopsis x Vanda
Iwanagara (Iwan) = Brassavola x Cattleya x Diacrium x Laelia
Izumiara (Izma) = Cattleya x Epidendrum x Laelia x Schomburgkia x Sophronitis