Habit: epiphytic herbs

Stem: noded, with scalelike sheath or roots

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

Leaf: position: distichous

Inflorescence: type: raceme, umbel

Inflorescence: position: laterally on stem

Inflorescence: other characteristics: branched, unbranched

Flower: other characteristics: spreading

Petal: similar to sepals

Labellum: spherical or elliptic or clavate, divided into epichil and hypochil, adnate to column, parallel to column

Column: without 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: compressed