Diuris

Terrestrial glabrous herbs, with ovoid to lobed tubers. Leaves 2–several, more or less basal, narrow, glabrous; flowering stem with several bracts. Flowers pedicellate, in terminal raceme, yellow, purple or white, often spotted or blotched with dark brown or purple, column uppermost; dorsal sepal erect, sometimes slightly recurved at apex, more or less ovate, blunt, clasping the column at base; lateral sepals narrow-linear, spreading or deflexed, parallel or crossed, longer than the dorsal sepal, often green; petals clawed, longer than dorsal sepal, ovate, elliptic or orbicular, erect or spreading. Labellum usually as long as or longer than dorsal sepal, deeply 3-lobed; mid-lobe much contracted at base, with 1 or 2 longitudinal ridges along narrow part. Column very short, stigma and stamen arising separately at base, staminode margins lobed or winged.