Oncidium
Kongl. Vetensk. Acad. Nya Handl. 21: 239. 1800.
Herbs, epiphytic or terrestrial, ± cespitose. Stems pseudobulbs, green, ovoid. Leaves persistent, 1–3, not recurved; blade conduplicate, linearlanceolate, dorsiventrally flattened, margins entire. Inflorescences paniculate racemes, lateral branches to 10 [–42] cm; bracts narrowly triangular. Flowers resupinate; sepals and petals distinct and free, oblongelliptic, obovate to nearly quadrangular or nearly circular, apex retuse to obtuse, sometimes apiculate; lip pandurate, 3-lobed; callus prominent warty-tuberculate-fringed; column with wings, arms, or fingerlike projections; stigmatic cavity ± round; rostellum not prominent. Fruits capsules.
Distribution
Tropical and subtropical, Western Hemisphere
Discussion
Species 800 (1 in the flora).
Oncidium is a large polymorphic, and probably paraphyletic, assemblage.
Selected References
None.