Grand spider orchid, Caladenia huegelii.

Photo by Graeme W.
Confirmed as Grand spider orchid, Caladenia huegelii.
This red and white spider orchid only occurs in a very small area and flowers later than others Caladenias. They are also a large plant that have very long calli on the top half of the labellum and are very red on the end part of the labellum.You will notice that the calli on the front of the labellum are also very small as opposed to the others and a funny shape.