WordNet sense 1 (any orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowers; often grown as houseplants):

oncidium, butterfly plant, dancing lady orchid

WordNet sense 2 (Mexican epiphytic orchid having pale green or yellow-green flowers with white purple-veined lip):

butterfly orchis, Encyclia venosa, Epidendrum venosum

WordNet sense 3 (orchid of Florida and the Bahamas having showy brightly colored flowers; sometimes placed in genus Epidendrum):

Encyclia tampensis, Epidendrum tampense

WordNet sense 4 (Mediterranean orchid having usually purple flowers with a fan-shaped spotted or striped rose-red lip):

Orchis papilionaceae