Genoplesium citriodorum

About

Genoplesium citriodorum, commonly known as the lemon-scented midge orchid, is a species of small terrestrial orchid that is endemic to New South Wales. It has a single thin leaf fused to the flowering stem and up to thirty three small, lemon scented, dark purplish black flowers. It usually grows under shrubs in shallow sandstone soil in the Blue Mountains.

Summary from Wikipedia