Habit: epiphytic herbs

Stem: branched, unbranched, sheathing above middle, with leaves, noded

Leaf: characteristics: conduplicate, sheathing or noding at base, apex notched or acute or obtuse or hooked

Leaf: position: distichous

Leaf: shape: oblong, base V-shaped

Inflorescence: position: arising from leaf axil

Flower: other characteristics: spreading

Sepal: free or similar

Labellum: 3-lobed, with longitudinal ridges or keels

Column: with wing or triangular-falcate or arm-shaped or subulate appendages

Pollinia: number: 2, 4

Pollinia: shape: globose or subglobose

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

Stipe: shape: 5-angulared

Viscidium:shape: saddlelike or luniform