Prasophyllum concinnum, commonly known as the trim leek orchid, is a species of orchid endemic to Tasmania. It has a single tubular leaf and green or yellowish-green flowers with brown markings. It was not seen after 1947, presumed to have gone extinct and listed as "rare" under the Tasmanian Government Threatened Species Protection Act 1995 but was rediscovered in 1992. Flowering of this orchid is dramatically stimulated by summer fires and the species is now known to be widespread in the state and has been removed from the Act.