Gastrodia R.Br.

7 species in Aust. (6 endemic, 1 native); all states and territories except NT

Leafless, terrestrial saprophyte with tuberous rhizomes. Flowers in a terminal raceme. Perianth segments connate into a 5-lobed tube very gibbous at the base under the labellum. Labellum shorter than the perianth and connate with it at the base; margins crisped or undulate; lamina with two longitudinal ridges converging and uniting towards the front or occasionally with only one ridge. Column erect, elongate, slightly winged. Anther almost hemispherical; pollinia 2, bilobed, granular; caudicle absent.