Caladenia robinsonii, commonly known as the Frankston spider orchid is a rare species of orchid which is endemic to Victoria, Australia. A shoot arises from the tuber each year in the early autumn producing a solitary leaf in May. In September to October a single (or rarely two) red and creamy yellow flower is produced on a hairy stem up to 30 cm high The flower is up to 4cm in width and has narrow sepals, four of which spread out horizontally plus an erect dorsal sepal.