The sides of the labellum sometimes have a few short teeth, the tip is curled under and there is a dense band of red or cream-coloured calli along the mid-line.

[2][3][4] Caladenia radialis was first described in 1927 by Richard Rogers from a specimen collected near Dowerin and the description was published in Transactions and Proceedings of the Royal Society of South Australia.

[1][5] The specific epithet (radialis) is derived from the Latin word radius meaning "ray", "rod" or "spoke",[6] referring to the radiating red lines on the labellum.

[3] The drooping spider orchid is found between the Fitzgerald River National Park and Northampton in the Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest and Mallee biogeographic regions where it grows in a range of habitats including on granite outcrops and near the edges of salt lakes.

[2][3][4][7] Caladenia radialis is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.