Small plants with creeping rhizomes. Leaves ± basal, almost in a rosette, ± petioled. Inflorescence many-flowered, one-sided, straight or slightly twisted. Flowers small, usually white, glandular. Dorsal sepal and petals adhering and forming a hood. Labellum with saccate basal half (hypochile) and a tongue-shaped anterior half (epichile). Column short; anther dorsal, attached by a short filament; rostellum erect, bifid; pollinia 2, seethe, attached to a viscid gland, which is inserted between the rostellum arms.