The flowers are bright yellow with a few prominent dark brown markings.

There is a ridge-shaped callus in the mid-line of the base of the labellum and extending about halfway along.

[2][3][4] Diuris sulphurea was first formally described in 1810 by Robert Brown and the description was published in Prodromus florae Novae Hollandiae.

It grows in forest, woodland, heath, grassland and coastal scrub.

[2][3][7] In Victoria it often occurs with Diuris pardina and sometimes forms hybrids with that species.