Raceme of few to many fls; floral bracts small, acute, hardly exceeding short pedicels. Per. glab., us. green; dorsal sepal uppermost in mature fls, broad and concave, much < ovary at fl.; lateral sepals almost equal in length but very much narrower, spreading or recurved, not connate; petals us. shorter and more obtuse, ± erect. Labellum about as long as other per.-segs, sessile, oblong to ovate, us. ± pendulous; calli us. paired at base, median and single near tip. Column short; wings membr., obtuse, attached to about mid-anther level; anther terminal, erect, almost entirely above stigma, ± hemispherical, pollinia not or obscurely bilobed, pollen granular; stigma broadly oval, slightly prominent; rostellum dark, its oval tip becoming detached with very short, threadlike stipe to which loosely coherent pollen masses adhere. Plants terrestrial, glab.; tuber globose to oval, often produced some distance from parent plant. Lf solitary; sheath long; lamina terete, ± hollow. Genus of perhaps a dozen spp., mainly Australian but extending also to S.E. Asia and to New Caledonia. N.Z. spp. probably all occur also in Australia.