Oncidium

Oncidium, abbreviated as Onc in horticultural trade, is a genus that contains about 330 species of orchids from the subfamily Epidendroideae of the orchid family (Orchidaceae). This is a complex, difficult genus, with many species being reclassified. Calls are made for splitting this genus into multiple genera.

This genus was first described by Olof Swartz in 1800 with the orchid Oncidium altissimum, which has become the type species. Its name is derived from the Greek word "onkos", meaning "swelling". This refers to the callus at the lower lip.

The flowers of the Oncidium genus come in shades of yellow, red, white and pink. The petals are often ruffled on the edges, as is the lip. The lip is enormous, partially blocking the small petals and sepals.


Selected Species
 Oncidium aberrans (Brazil - Paraná).
 Oncidium abortivum (N. Venezuela to Ecuador).
 Oncidium abruptum (Colombia to Ecuador).
 Oncidium acinaceum (Ecuador to Peru).
 Oncidium acrochordonia (Colombia).
 Oncidium adelaidae (Colombia).
 Oncidium advena (N. Venezuela).
 Oncidium albini (Brazil - Paraná).
 Oncidium alcicorne (Colombia).
 Oncidium allenii (Panama).
 Oncidium aloisii (Ecuador).
 Oncidium altissimum : 'Wydler's Dancing-lady Orchid']] (Jamaica).
 Oncidium amabile (Brazil).
 Oncidium amictum (SE. Brazil).
 Oncidium amoenum (Mexico).
 Oncidium andradeanum (Ecuador to Peru).
 Oncidium andreae (Colombia).
 Oncidium andreanum (SW. Mexico).
 Oncidium angustisegmentum (Peru).
 Oncidium × ann-hadderae (O. haitiense]] × O. variegatum) (Dominican Republic).
 Oncidium anomalum (Colombia).
 Oncidium ansiferum (C. America to Colombia).
 Oncidium anthocrene (Colombia to Ecuador).
 Oncidium antioquiense (Colombia).
 Oncidium ariasii (Peru).
 Oncidium arizajulianum (Dominican Republic) (now synonym of Tolumnia arizajuliana)
 Oncidium armillare (W. South America to N. Venezuela).
 Oncidium aspecum (Peru).
 Oncidium auricula (SE. Brazil).
 Oncidium auriferum (Colombia to NW. Venezuela).
 Oncidium aurorae (Peru).
 Oncidium ayabacanum (Peru).
 Oncidium baccatum (Venezuela).
 Oncidium bahiense (Cogn.) Schltr (NE Brasil)
 Oncidium barbaceniae (Brazil - Minas Gerais)

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