It has a single thin, wiry leaf and up to four cream-coloured to canary yellow flowers with four rows of short hairs on the back of the column.

The flowers are short-lived, self-pollinating and open only slowly on hot, humid days.

[2][3][4][5] Thelymitra flexuosa was first formally described in 1839 by Stephan Endlicher and the description was published in Novarum Stirpium Decades.

[6][7] The specific epithet (flexuosa) is a Latin word meaning "full of bends", "tortuous", "crooked" or "winding",[8]: 692  referring to the twisted or "zig-zagged" flowering stem.

It grows with sedges and low shrubs in moist places such as the edge of swamps.