Habit: epiphytic herbs

Leaf: characteristics: 1, 2, petiolate

Leaf: shape: elliptic

Inflorescence: type: raceme

Floral bract: small

Sepal: free or similar, lateral sepals spreading or oblique or reflexed or connivent

Petal: similar to sepals, narrower than sepals or as long as dorsal sepal

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

Stigma: concave

Pollinia: number: 4

Fruit:type: capsule

Fruit: other characteristics: with 3 or 6 ridges