Habit: saprophytic herbs

Stem: sheathing above middle, without leaf

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: small, membranous

Sepal: free or similar, lateral sepals adnate to column foot or labellum forming a mentum, lateral sepals spreading or oblique or reflexed or connivent

Petal: shorter or smaller than sepals

Labellum: 3-lobed, adnate to column, not lobed

Column: without column foot

Pollinia: number: 4

Pollinia: other characteristics: with caudicle or viscidium, without caudicle