The flower above is called Dendrobium Thyrsiflorum, a species from Asia (India, Burma, Thailand, Laos, Vietnam and China). I still remember the firts time I saw one, like a beautiful chinese lantern hanging down. Moreover, that particular plant had like six lanterns. I had to find one! I bought one from a grower in a 2 inch pot and the plant grew fast and started flowering regularly. Then it started doing badly and I thought it would die. It had not flowered in like four years and is recovering very nicely. This year it has a total of five bunches. One already flowered, this one and three more will be flowering soon. Each flower is like one and one quarter inches and is shown blown up on the right.
On the left a Brazilian species, Cattleya Schilleriana. the lip is not as nice as it could be, but the flower is very well shaped. On the right an Oncidium hybrid, but I have no idea what it is.