Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, stemlike

Tuber: present

Stem: glabrous, with leaves

Leaf: characteristics: sessile or subsessile

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: leaflike

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

Petal: similar to sepals

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

Stigma: concave, with appendage

Pollinia: number: 4

Pollinia: other characteristics: granular-farinaceous, neither caudicle nor viscidium