Oncidium

Swartz

Kongl. Vetensk. Acad. Nya Handl. 21: 239. 1800.

Etymology: Greek oncos, swelling, and - idium, diminutive, in reference to prominent lip callus
Treatment appears in FNA Volume 26. Treatment on page 648. Mentioned on page 496, 497, 649, 650, 651.

Herbs, epiphytic or terrestrial, ± cespitose. Stems pseudobulbs, green, ovoid. Leaves persistent, 1–3, not recurved; blade conduplicate, linear-lanceolate, dorsiventrally flattened, margins entire. Inflorescences paniculate racemes, lateral branches to 10[–42] cm; bracts narrowly triangular. Flowers resupinate; sepals and petals distinct and free, oblong-elliptic, 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.

Lower Taxa

... more about "Oncidium"
Mark W. ChaseChase +  and Mark W. +
Swartz +
Tropical and subtropical +  and Western Hemisphere. +
Greek oncos, swelling, and - idium, diminutive, in reference to prominent lip callus +
Kongl. Vetensk. Acad. Nya Handl. +
chase1987a +, garay1974a +  and sauleda1989a +
Oncidium +
Orchidaceae (tribe Maxillarieae) subtribe Oncidiinae +