; Kongl. Vetensk. Acad. Nya Handl. 21: 239 (1800) s. str.
Distribution: Florida and tropical America, only 1 in Brazil. Generic results have led to a drastic change in the circumscription of Oncidium s. str. (M. W. Chase & N. H. Williams 2008), removing practically all Brazilian species except one into Gomesa and other genera, but newly including Cochlioda, Odontoglossum and Symphyglossum. Species delimitation is very much disputed in many cases, leading to complex nomenclature.
= Anachaste Lindl.; Stevens´s Auction Cat. 1853(19-20 May): no. 22 (1853)
= Chamaeleorchis Senghas & Lückel; Orchideen [Schlechter], ed. 3, Bd. I: 2305 (1997)
= Cochlioda Lindl.; Fol. Orchid. 4(Cochlioda): 1 (1853)
= Collare-stuartense Senghas & Bockemühl; J. Orchideenfr. 4(2): 73 (1997) (Collare-Stuartense)
= Heteranthocidium Szlach., Mytnik & Romowicz; Polish Bot. J. 51(1): 54 (2006)
= Matalbatzia Archila; Revista Guatemalensis 2(3): 34 (1999), the word "Type" or equivalent not used
= Mexicoa Garay; Bradea 1(40): 423 (1974)
= Miltoniastrum (Rchb.f.) Lindl.; Veg. Kingd., ed. 3: 183c (1853)
= Miltonioides Brieger & Lückel; Orchidee (Hamburg) 34(4): 130 (1983)
= Odontoglossum Kunth; Nov. Gen. Sp. [H.B.K.] 1: 350, t. 85 (1816)
= Petalocentrum Schltr.; Repert. Spec. Nov. Regni Veg. 15: 144 (1918)
= Roezliella Schltr.; Repert. Spec. Nov. Regni Veg. 15: 146 (1918)
= Sigmatostalix Rchb.f.; Bot. Zeitung (Berlin) 10: 769 (1852)
= Solenidiopsis Senghas; Orchidee (Hamburg) 37(6): 274 (1986)
= Symphyglossum Schltr.; Orchis 13: 8 (1919), nom. cons.
= Xeilyathum Raf.; Fl. Tellur. 2: 62 (1837)
