insularis is a terrestrial, perennial, deciduous, herb with an underground tuber and which usually grows as solitary plants.

[1][2][3] 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.

'Duke of Orleans Bay' and Hopper and Brown prepared an unpublished manuscript description of Caladenia longicauda subsp.

[5] The subspecies name (insularis) is a Latin word meaning “of islands"[6] referring to the location of the type specimen.

insularis is classified as "Priority One" by the Western Australian Government Department of Parks and Wildlife,[7] meaning that it is known from only one or a few locations which are potentially at risk.