There is a dark purplish black callus in the centre of the labellum and covering about two-thirds of its surface.

[2][3] Genoplesium pedersonii was first formally described in 1991 by David Jones and the description was published in Australian Orchid Research.

[4] In 2002, David Jones and Mark Clements changed the name to Corunastylis pedersonii and the species is known by that name in Queensland, but the name is not accepted by the Australian Plant Census.

[1][5] The specific epithet (pedersonii) honours Mr Ted Pederson who discovered this and several other orchid species.

[3] Genoplesium pedersonii grows with sedges and mosses in moist areas on rock ledges on the Blackdown Tableland.