The column is blue with a yellow crest, 4–5 mm (0.2–0.2 in) long and about 2.5 mm (0.1 in) wide and the lobe on the top of the anther is short and densely covered with short, finger-like yellow glands.

[4] Thelymitra crinita was first formally described in 1839 by John Lindley and the description was published in A Sketch of the Vegetation of the Swan River Colony.

[7] The specific epithet (crinita) is a Latin word meaning "hairy",[8] referring to the crest on top of the column.

[3] The blue lady orchid grows in coastal and near-coastal forest, sometimes in swampy places and is found between Gingin and Esperance in the Esperance Plains, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions growing on grey-white sand and loamy clay.

[2][4][9] This orchid is common in its range and is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.