Coelogyne Lindl., Collect. Bot. (1825) sub t. 33
- Genus Hologyne Pfitzer in Engl., Pflanzenr. IV. 50. II. B. 7 (1907) 131
- Genus Ptychogyne Pfitzer in Engl., Pflanzenr. IV. 50. II. B. 7 (1907) 18
Sympodial epiphytic or terrestrial plants with short to long rhizomes. Pseudobulbs conspicuous, consisting of a single internode, one- or two-leaved. Leaves not sheathing at the base, glabrous or with minute scale-hairs, usually plicate, deciduous, convolute or rarely duplicate, thin-textured, rarely more leathery. Inflorescence arising from the base of the plant (heteranthous), or from the apex of the developing shoot (proteranthous or synanthous), or from the apex of the mature pseudobulb (hysteranthous), a few- to many-flowered raceme, very rarely carrying a single flower only. Flowers rather small to large, resupinate, often showy. Sepals free, white, green, brownish or yellowish. Petals free, about as long as but usually much narrower than the dorsal sepal. Lip without spur, rarely sac-shaped at the base, not mobile, three-lobed, with the lateral lobes erect. Column at the apex hood-shaped, overtopping the anther. Column-foot absent. Pollinia 4, solid, caudicles present, stipe absent, viscidium absent.
Species present in New Guinea: