Jabarkan Imerinaea Imerinorchis Szlach (2005) dari Daftar marga anggota Orchidaceae

Inobulbon Ione Ionopsis: Violet Orchid

Ipsea Isabelia Ischnocentrum Ischnogyne Isochilus: Equal-lip Orchid

Jejosephia Jonesiopsis Jostia Jumellea K

Kalimpongia Kaurorchis Kefersteinia Kegeliella Kerigomnia Kinetochilus Kingidium Kionophyton Koellensteinia: Grass-leaf Orchid

Konantzia Kraenzlinella Kreodanthus Kryptostoma Kuhlhasseltia L

Laeliocattleya Laeliopsis Lanium Lankesterella Leaoa Lecanorchis Lemboglossum Lemurella Lemurorchis Leochilus: Smooth-lip Orchid

Lepidogyne Leporella Leptotes Lesliea Leucohyle Ligeophila Limodorum Lindleyalis Liparis: Wide-lip Orchid

Listrostachys Lockhartia Loefgrenianthus Ludisia: Jewel Orchid

Lueddemannia Luisia Lycaste: Bee Orchid

Macroclinium Macropodanthus Madisonania Malaxis: Adder's-mouth Orchis

Malleola Manniella Margelliantha Masdevallia Mastigion Maxillaria: Tiger Orchid, Flame Orchid

Mecopodum Mediocalcar Megalorchis Megalotus Megastylis Meiracyllium Meliorchis: (In 2007, the 20 million year old pollinia of Meliorchis caribea were found on the back of a worker bee trapped in amber.)