Habit: terrestrial herbs

Stem: unbranched

Leaf: characteristics: several to many, sheathing or noding at base, base clasping

Leaf: position: alternate, in two rows

Inflorescence: position: terminal or subterminal

Floral bract: small

Inflorescence: other characteristics: branched, unbranched

Sepal: free or similar

Petal: broader than sepals

Labellum: 3-lobed, adnate to column

Column: with wing or triangular-falcate or arm-shaped or subulate appendages, without column foot

Pollinia: number: 8

Pollinia: other characteristics: with caudicle or viscidium