It has a single hairy leaf and up to three large, bright white flowers with long, broad, spreading lateral sepals and petals, a relatively broad labellum with short, narrow teeth.

It is a relatively common orchid found in a broad band, mainly between Tenterden and Jerramungup.Caladenia longicauda subsp.

[2][3][4][5][6] 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.

[3] The stark white spider orchid mainly occurs between Tenterden and Jerramungup but is also found as far east as Esperance and as far north as Moora, in the Avon Wheatbelt, Coolgardie, Esperance Plains, Jarrah Forest, Mallee and Swan Coastal Plain biogeographic regions where it grows in wandoo (Eucalyptus wandoo) and yate (Eucalyptus cornuta) woodland.

eminens is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.