Oncidium, abbreviated as Onc. in the horticultural trade, is a genus that contains about 330 species of orchids from the subtribe Oncidiinae of the orchid family (Orchidaceae).It is distributed across much of South America, Central America, Mexico and the West Indies, with one species (O. ensatum) extending into Florida. Common names for plants in this genus include dancing-lady orchid and golden shower orchid.
The cultivar illustrated here is Oncidium Gower Ramsey "Lemon Heart". There is the pure yellow mass effect, justifying the common name "golden shower", but when one looks closer one can see greenish stripes on the petals and dorsal sepals.
This post is part of the Floral Friday Fotos meme.