Oncidium n. : A genus of tropical orchidaceous plants, the flower of one species of which (O. Papilio) resembles a butterfly.

Example:
Will my Oncidium orchid bloom for a 2nd time this year?

Taxonomy
Brazil, Colombia, Ecuador, Peru, Mexico, synonym, Venezuela, S. Brazil, to Brazil, Oncidium, Argentina, Costa Rica, Bolivia, Panama, Rio de Janeiro, SW, America, South America.

Defination from the web:
Oncidium, abbreviated as Onc in horticultural trade, is a genus that contains about 330 species of orchids from the subfamily Epidendroideae of ... Most species in the Oncidium genus are epiphytes, although some are lithophytes or terrestrials. ...