The Oncidiinae is a subtribe within the Orchidaceae that consists of a number of genera that are closely related.
This subtribe consists of about 70 genera with over 1000 species, with Oncidium as its largest genus. These genera consist of a single floral type based on the angle of the attachment of the lip to the column, reflecting pollinator preferences. This has however led to several unreliable results and polyphyletic taxa within Oncidium. These were transferred to Gomesa and a new genus Nohawilliamsia, has been described for Oncidium orthostates
Most species have well-developed pseudobulbs and conduplicate leaves.
It is possible to form hybrids in some instances between multiple genera within the Oncidiinae. These hybrids are often colloquially referred to as "intergenerics."
Genera
Genera recognized in Chase et al.'s 2015 classification of Orchidaceae:
Aspasia Brassia Caluera Capanemia Caucaea Centroglossa Chytroglossa Cischweinfia Comparettia Cuitlauzina Cypholoron Cyrtochiloides Cyrtochilum Dunstervillea Eloyella Erycina Fernandezia Gomesa Grandiphyllum – synonym of Trichocentrum Hintonella Hofmeisterella Ionopsis Leochilus Lockhartia Macradenia Macroclinium Miltonia Miltoniopsis Notylia Notyliopsis Oliveriana Oncidium Ornithocephalus Otoglossum Phymatidium Platyrhiza Plectrophora Polyotidium Psychopsiella (sometimes included in Psychopsis) Psychopsis Pterostemma Quekettia Rauhiella Rhynchostele Rodriguezia Rossioglossum Sanderella Saundersia – synonym of Trichocentrum Schunkea Seegeriella Solenidium Suarezia Sutrina Systeloglossum Telipogon Thysanoglossa Tolumnia Trichocentrum Trichoceros Trichopilia Trizeuxis Vitekorchis Warmingia Zelenkoa Zygostates
In synonymy: Ada = Brassia Odontoglossum = Oncidium
References
Mark W. Chase - A Reappraisal of the Oncidioid Orchids; Systematic Botany, Vol. 11, No. 3 (Jul. - Sep., 1986), pp. 477–491
External links Details of the Oncidium Alliance Article on the Oncidium Alliance Orchids