Caladenia longicauda is a species of plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia.

The flowers are mostly white except for a few red markings and reddish stripes on the backs of the petals and sepals.

[2][3][4] Caladenia longicauda was first formally described by John Lindley in 1840 and the description was published in A Sketch of the Vegetation of the Swan River Colony.

[6] The names of fourteen subspecies of C. longicauda are accepted by the Australian Plant Census:[7] Caladenia longicauda grows in a wide range of habitats from the Kalbarri National Park on the west coast to Israelite Bay on the south coast.

[2] Most subspecies of C. longicauda are classified as "Not Threatened" but subspecies extrema and insularis are classified as "Priority One" by the Western Australian Government Department of Parks and Wildlife[10][11] meaning that they are known from only one or a few locations which are potentially at risk.