Erect or pendulous, epiphytic herbs, of very variable vegetative habit, usually with elongate, often branching rhizomes. Pseudobulbs monophyllous, ligular to suborbicular, strongly ancipitous to very thick and fleshy, 1.5-4.5 cm. long and .5-1.5 cm. wide, approximate to very distant, inserted at an acute angle on the stems, the long cylindric internodes and the bases enveloped in closely imbricating, papery bracts. Leaves subcoriaceous, ligular, acute, 6-18 cm. long and 1.2-2.5 cm. wide, the bases contracted into very short conduplicate petioles. Inflorescences very short, 1-flowered scapes, produced in dense subsessile fascicles from the bases of the mature pseudobulbs. Flowers small, usually enveloped in 2 glumaceous bracts. Sepals free, apparently not spreading, concave, yellow or white, about 6 mm. long, the dorsal sepal elliptic-ovate, acute, the laterals broadly rhombic with oblique, acute apices, the oblique bases forming an acute or rounded, conspicuous mentum. Petals subequal to the dorsal sepal, oblong-ligular, subacute, about 4.5 mm. long, similarly colored with the sepals. Lip yellow, about 6 mm. long and 3 mm. wide when spread out, geniculate in profile, the long narrow base continuous with the base of the column, the limb dilated and conspicuously 3-lobed near the apex, the obliquely triangular lateral lobes erect, joined below the apices by a narrow transverse callus, the mid-lobe rather fleshy, triangular to broadly ovate, acute to obtuse, inserted at an abruptly deflexed angle below the apices of the lateral lobes. Column short, about 1.7 mm. long, the base continuous with the claw of the lip.
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