Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, with fibrous roots

Stem: glabrous, hairy, tufted or separate, sheathing below middle

Leaf: characteristics: plicate or plicate-venous

Leaf: position: alternate, opposite or subopposite

Leaf: shape: ovate, cordate, elliptic

Inflorescence: position: terminal or subterminal

Floral bract: leaflike

Labellum: with sac or spur or auricles at base, spherical or elliptic or clavate, with broad mentum

Column: with 2 fertile stamens, with 1 staminode on top, 1 stigma below, cylindrical, downcurved

Anther: 2-loculed

Stigma: 3-lobed or 2-lobed, with papilla

Pollinia: number: 0

Staminode: 1

Fruit:type: capsule