Pachystoma Blume, Bijdr. (1825) 376
- Genus Apaturia Lindl., Gen. Sp. Orchid. Pl. (1831) 130
- Genus Pachychilus Blume, Fl. Javae (1828) vii
Sympodial terrestrial plants with a subterranean swollen rhizome. Leaf-bearing shoot almost stemless, 1- or 2-leaved. Leaves sheathing at the base, very narrow, glabrous, plicate, often withered at the time of flowering, thin-textured. Inflorescence arising from the rhizome, usually far separated from the leaf-bearing shoot, a few- to many-flowered raceme. Flowers small, resupinate, all parts hairy, including the column. Sepals free. Petals free, narrower than the sepals. Lip without spur, not mobile, at the base with a concavity which is almost closed by a callus on the short column-foot, 3-lobed, the midlobe with 5 to 7 warty keels. Pollinia 8, solid, caudicles present, stipe and viscidium absent.
Species present in New Guinea: