acaulescent herbs. Roots fusiform, fleshy. Leaves basal, linear-elliptic or
broadly ovate, sheathing at base. Inflorescence terminal, many flowered raceme.
Flowers small, spirally arranged around rachis, resupinate, not open widely.
Sepals narrowly elliptic to lanceolate, subsimilar, free; dorsal sepal often
connivent with petals and forming a hood; lateral sepals dilated or sometimes
saccate at base. Petals erect, oblanceolate; lip entire or obscurely 3-lobed,
shortly clawed; disk papillose, with 2 fleshy glands at base. Column clavate;
anther erect, 2-locular; pollinia 2, each 2-partite, granular-farinaceous,
attached to narrow viscidium. Ovary twisted, fusiform; stigma suborbicular to
elliptic. Capsule ellipsoid.