Habit: epiphytic herbs

Stem: with leaves, with scalelike sheath or roots

Leaf: characteristics: sheathing or noding at base, base clasping

Leaf: position: basal

Leaf: shape: lanceolate, elliptic, oblong

Inflorescence: position: laterally on stem

Inflorescence: other characteristics: branched, unbranched

Sepal: free or similar

Petal: similar to sepals, broader than sepals

Labellum: 3-lobed, adnate to column, parallel to column

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

Rostellum: 2-lobed or beaked

Pollinia: number: 2

Pollinia: shape: globose or subglobose

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

Stipe: shape: spatulate or subspatulate

Viscidium: other characteristics: wider than stipe