It has a single hairy leaf and up to three mostly white flowers with long, drooping sepals and petals.

Caladenia longicauda is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf 6–12 mm (0.2–0.5 in) wide.

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

[6] Daddy-long-legs spider orchid is relatively widespread and locally common, usually growing in sandy, well-drained soil in wandoo woodland, near creeks, in sheoak groves and Acacia thickets between Cataby and the Murchison River[2][3][4] in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain biogeographic regions.

borealis is classified as "Not Threatened" by the Western Australian Government Department of Parks and Wildlife.