For me, one of the most beautiful Brazilian Oncidium species! Extremely fragrant! It is native of the Amazon forests and likes hot and humid environment, but well ventilated otherwise it will rot. It is not easy to grow in my area where the temps fall as down as 38-39 Fº, but here it is in full bloom, three spikes!
Pseudo bulbs are very small, leaves thick and broad.
As for the genus name, some want to change it to Lophiaris, others to Trichocentrum... well, it is Oncidium for now!
Plant and spike:
Oncidium lanceanum Lindl. on Flickr - Photo Sharing!
Flower Detail:
Oncidium lanceanum Lindl. on Flickr - Photo Sharing!