This was my favorite flower at the place. Taken at the Conservatory of Flowers in San Francisco, CA.
Dendrobium spectabile Subtribe: Dendrobiinae
Dendrobium spectabile is found in the Latourea section of Dendrobium and is found in New Guinea. This species will grow into a large robust plant so will require a good sized pot or basket. The media should be well drained, but not too dry as most Latoureas seem to prefer to be kept damp but not soggy wet.
(info from orchidsonline.com)