Erect, epiphytic herbs. Stem simple or with an occasional short branch, leafy. Leaves distichous, coriaceous, obtusely unequally bilobed, articulate to a sheathing base; sheaths rugose, falcate. Inflorescence erect, racemose or paniculate, many-flowered; floral bracts minute, acuminate. Flowers about 4 mm long, resupinate, mostly greenish white streaked with brown, labellum greenish white or white, sometimes with violet around entrance to sac. Sepals and petals similar, free. Dorsal sepal connivent with petals to form a galea. Labellum sessile, base scrotiform, apex recurved, provided with a swelling, entrance almost closed, back wall callus absent. Column fleshy, obtuse, stelidia obscure, foot absent, clinandrium distinctly excavate, dorsally reclinate; anther cap mitre-shaped, pollinia four, free, globose, stipe linear, replicate, viscidium elliptic; stigma with a vertical margin, narrowly elliptic; rostellum vertical, pointing upward, prominently bifurcate.