Rhomboda Lindl., J. Linn. Soc., Bot. 1 (1857) 181
Sympodial terrestrial plants. Stem elongated, slightly succulent, basal part creeping, forming a rhizome, apical part erect, few-leaved. Leaves crowded at the stem apex, sheathing at the base, glabrous, persistent, convolute, dark green or brownish, with a white or reddish mid-vein, herbaceous. Inflorescence a terminal, many-flowered raceme. Flowers small, usually only partly resupinate (lip pointing sideways), brownish with white petals and lip. Sepals free. Petals free, about as long as the dorsal sepal, usually cohering at the apices. Lip not spurred, not mobile, at the base with 2 warts, inside in the middle with two closely parallel crests, outside laterally with a low keel. Column in front with two longitudinal lamellae. Column-foot absent. Pollinia sectile, caudicles present, stipe absent, viscidium present. Stigma with 2 clearly separated lobes.