Habit: epiphytic herbs

Stem: branched, unbranched, with leaves

Leaf: characteristics: sheathing or noding at base, margin recurved or apex lobed, base clasping

Leaf: position: distichous

Inflorescence: type: raceme, panicle

Inflorescence: position: laterally on stem

Inflorescence: other characteristics: branched, unbranched

Flower: other characteristics: spreading

Sepal: lateral sepals dilated or saccate at base or bent downward

Petal: similar to sepals

Labellum: with sac or spur or auricles at base, 3-lobed, with longitudinal ridges or keels

Column: with column foot

Pollinia: number: 4

Pollinia: other characteristics: with caudicle or viscidium, with stipe

Stipe: shape: triangular or subtriangular

Viscidium: other characteristics: wider than stipe, as wide as stipe