Habit: terrestrial herbs, saprophytic herbs

Rhizome: with tufted roots, with fleshy roots

Stem: unbranched, sheathing below middle

Leaf: characteristics: plicate or plicate-venous, sessile or subsessile

Leaf: position: alternate

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: leaflike

Flower: other characteristics: zygomorphic

Sepal: free or similar

Petal: shorter or smaller than sepals

Labellum: with sac or spur or auricles at base, 3-lobed

Anther: 2-loculed

Stigma: concave

Staminode: 2, spotted

Fruit:type: capsule