Diuris secundiflora, commonly known as the one-sided donkey orchid,[2] is a poorly-known species of orchid that is endemic to New South Wales.

Diuris secundiflora is a tuberous, perennial herb with a single leaf about 90 mm (4 in) long, 3 mm (0.1 in) wide and folded lengthwise.

There are two thick callus ridges 2–3 mm (0.08–0.1 in) long near the mid-line of the labellum.

[2][3] Diuris secundiflora was first formally described in 1878 by Robert FitzGerald and the description was published in his book Australian Orchids.

[4] The one-sided donkey orchid is only known from the type location near the Macleay River "growing in a small cluster on an open bank".