Habenaria (Hab)
Hackerara (Hkr) = Cattleya x Epidendrum x Laelia x Oerstedella x Sophronitis
Hagerara (Hgra) = Doritis x Phalaenopsis x Vanda
Hagsatera (Hag)
Hagsavola (Hgv) = Brassavola x Hagsatera
Hagsechea (Hgc) = Hagsatera x Prosthechea
Halleorchis (Hlo)
Hamelwellsara (Hmwsa) = Aganisia x Batemannia x Otostylis x Zygopetalum x Zygosepalum
Hamiltonara (Hmtn) = Ada x Brassia x Cochlioda x Odontoglossum
Hamularia (Hmu)
Hanesara (Han) = Aerides x Arachnis x Neofinetia
Haraella (Hal)
Haraenopsis (Hnp) = Haraella x Phalaenopsis
Hartara (Hart) = Broughtonia x Laelia x Sophronitis
Hasegawaara (Hasgw) = Brassavola x Broughtonia x Cattleya x Laelia x Sophronitis
Hattoriara (Hatt) = Brassavola x Broughtonia x Cattleya x Epidendrum x Laelia
Hausermannara (Haus) = Doritis x Phalaenopsis x Vandopsis
Hawaiiara (Haw) = Renanthera x Vanda x Vandopsis
Hawkesara (Hwkra) = Cattleya x Cattleyopsis x Epidendrum
Hawkinsara (Hknsa) = Broughtonia x Cattleya x Laelia x Sophronitis
Helcia (Hlc)
Helpilia (Hpla) = Helcia x Trichopilia
Hemipiliopsis (Hmp)
Herbertara (Hbtr) = Cattleya x Laelia x Schomburgkia x Sophronitis
Herminium (H)
Hermorchis (Hrm) = Herminium x Orchis
Herscheliodisa (Hrds) = Disa x Herschelia
Hertensteinara (Hrt) = Cischweinfia x Leochilus x Oncidium x Rodriguezia
Heterozeuxine (Htz)
Higashiara (Hgsh) = Cattleya x Diacrium x Laelia x Sophronitis
Hildaara (Hdra) = Broughtonia x Laeliopsis x Schomburgkia
Himantoglossum (Him)
Himoriara (Hmra) = Ascocentrum x Phalaenopsis x Rhynchostylis x Vanda
Hirayamaara (Hry) = Ascocentrum x Neofinetia x Paraphalaenopsis x Rhynchostylis x Vanda
Hofmeisterella (Hf)
Holcanthera (Hol) = Holcoglossum x Renanthra
Holcenda (Hln) = Ascocentrum x Holcoglossum x Vanda
Holcocentrum (Hctm) = Ascocentrum x Holcoglossum
Holcoglossum (Holc)
Holcopsis (Hlp) = Holcoglossum x Vandopsis
Holcosia (Hls) = Holcoglossum x Luisia
Holmara (Hlm) = Baptistonia x Leochilus x Oncidium x Rodriguezia
Holttumara (Holtt) = Arachnis x Renanthera x Vanda
Homalopetalum (Hom)
Hookerara (Hook) = Brassavola x Cattleya x Diacrium
Houlletia (Hlt)
Houllora (Hlra) = Gongora x Houlletia
Howeara (Hwra) = Leochilus x Oncidium x Rodriguezia
Hueylihara (Hylra) = Neofinetia x Renanthera x Rhynchostylis
Hugofreedara (Hgfda) = Ascocentrum x Doritis x Kingiella
Humboldtara (Hmb) = Cuitlauzina x Miltonia x Miltoniopsis x Odontoglossum x Oncidium
Hummelara (Humm) = Barkeria x Brassavola x Epidendrum
Huntleanthes (Hnths) = Cochleanthes x Huntleya
Huntleya (Hya)
Hyedecromara (Hcm) = Comparettia x Oncidium x Rodriguezia x Zelenkoa
Hygranda (Hyd) = Hygrochilus x Vanda
Hygrocenda (Hcd) = Ascocentrum x Hygrochilus x Vanda
Hygrochilus (Hy)
Hygrodirea (Hgd) = Hygrochilus x Sedirea