Dwarf epiphytic or lithophytic herbs, forming mats on the substrate. Rhizome creeping. Pseudobulbs of one node, ovoidspherical, dorsiventrally compressed, covered by sheaths that disintegrate into a reticulate network, bearing one or two leaves at apex. Leaves usually two, appearing after or together with flowers at apex of pseudobulbs, coriaceous, spreading, narrowly elliptical, lanceolate or oblong-ovate, acute or obtuse, base tapering to a petiole, articulated at apex of pseudobulb. Inflorescence synanthous or proteranthous, terminal, from apex or base of pseudobulb, usually bearing only one flower; floral bracts conspicuous, covering ovary. Flower usually solitary, subcampanulate, not widely opening, brown or dull red-brown. Sepals similar, fused from base almost to tip, forming a tube-shaped flower entirely enclosing petals, column, and labellum. Dorsal sepal ovate. Lateral sepals obliquely ovate-falcate. Petals shorter than sepals, elliptical- to oblong-lanceolate. Labellum entire or indistinctly trilobed, recurved, V-shaped in transverse section. Column with a foot two times as long as column, curving; anther incumbent, pollinia eight, in two groups of four, clavate, laterally compressed; stigma concave, oval to almost circular; rostellum broad, truncate. (PC, YN).