Cooktownia robertsii, commonly known as the mystery orchid, is the only species of plant in the orchid genus Cooktownia and is endemic to far north Queensland. It is a rare ground orchid, named in honour of the first scientist to discover it, Lewis Roberts and has two ground-hugging leaves and up to nine small green flowers. It is an unusual species because of its highly modified column which lacks pollen and does not have a receptive stigma.