Apostasia Blume, Bijdr. (1825) 423
- Genus Adactylus (Endl.) Rolfe, Orchid Rev. 4 (1896) 329
- Genus Mesodactylis Wall., Pl. Asiat. Rar. 1 (1830) 74
- Genus Niemeyera F.Muell., Fragm. Phytogr. Austr. 6 (1867) 96
Sympodial terrestrial plants without distinct rhizomes, all parts glabrous. Stem elongated, few- to many-leaved, often branched, not fleshy. Leaves spirally arranged, sheathing at the base, not plicate, persistent, convolute, thin-textured; apices tubular-filiform. Inflorescence a terminal panicle. Ovary not articulated from the pedicel. Flowers small, not resupinate. Sepals free. Petals free, rather similar to the sepals. Lip without spur, not mobile, similar to the petals. Column-foot absent. Fertile anthers 2, clasping the style, pollen not aggregated into pollinia, powdery.
Species present in New Guinea: