What is "leptoceras"

Leptoceras menziesii, commonly known as rabbit orchid, is a plant in the orchid family, Orchidaceae and the only member of the genus Leptoceras. It is a slender plant, usually found in large colonies and which only flowers after fire. The flowers are small, white, pink and red on a stem up to tall and is endemic to southern Australia. It was one of the first orchids from Western Australia to be described and was given the name Caladenia menziesii, a name still used by some authorities.