Habit: epiphytic herbs

Leaf: characteristics: absent

Inflorescence: other characteristics: branched, unbranched

Flower: other characteristics: spreading

Sepal: lateral sepals adnate to column foot or labellum forming a mentum

Labellum: 3-lobed, with longitudinal ridges or keels, adnate to column

Column: with column foot

Operculum: with appendage

Pollinia: number: 2, 4

Pollinia: shape: globose or subglobose

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

Stipe: shape: compressed

Viscidium:shape: orbicular or suborbicular

Viscidium: other characteristics: wider than stipe