Perennial geophytic herbs. Roots filamentous. Tubers globose, paired, fleshy, partly enclosed within a multi- layered persistent fibrous tunic; replacement tubers formed at the end of short droppers; daughter tubers formed on the end of slender root-like stolons. Stem erect, short, unbranched, with a membranous cataphyll at the apical node, covered by a multi-layered persistent fibrous tunic to the soil surface. Leaf solitary, basal, sessile, glabrous or with a few trichomes; lamina ovate, subcoriaceous, convolute in bud, margins entire, a small ligule-like growth in the base of sterile leaves; venation anastomosing. Inflorescence racemose, 1-few flowered erect, terminal; scape hairy, with one sterile bract; floral bracts foliaceous, sheathing. Flowers resupinate, dull- coloured, pedicellate; perianth glandular externally. Dorsal sepal free, dissimilar to the lateral sepals, cucullate over the column. Lateral sepals free, erect. Petals free, erect, clavate, densely glandular, markedly dissimilar in size and shape to the sepals. Labellum free, attached by its base to the anterior column base, markedly dissimilar in size and shape to the sepals and petals, ecalcarate; lamina obscurely three- lobed, the margins erect, entire or slightly irregular; callus of two irregular longitudinal rows of calli; calli stalked, gammate, papillate; basal calli similar to the rest; nectar present. Column lacking free filament and style, incurved or nearly straight, broadly winged; column foot absent; anther terminal, four-celled, persistent, basifixed, erect, papillate, rostrate; pollinia four, bilobed, flat, mealy, naked, yellow; rostellum ventral; stigma entire, circular, concave. Ovary elongate, ribbed, covered with glandular trichomes. Capsules dehiscent, hairy, erect; pedicels not elongating in fruit. Seeds numerous, light-coloured, winged.