Habit: terrestrial herbs

Rhizome: with tufted roots

Stem: unbranched

Leaf: characteristics: plicate or plicate-venous, sheathing or noding at base

Leaf: position: distichous

Inflorescence: type: panicle

Inflorescence: position: arising from leaf axil

Inflorescence: other characteristics: branched

Flower: other characteristics: distichously arranged

Petal: base connivent to sepals or with claw

Labellum: with longitudinal ridges or keels

Column: with auricles

Stigma: 3-lobed or 2-lobed

Rostellum: 2-lobed or beaked

Pollinia: number: 2

Pollinia: other characteristics: granular-farinaceous, with caudicle or viscidium

Fruit:type: capsule

Fruit: other characteristics: with 3 or 6 ridges, with persistent column