Terrestrial, erect, to 65 cm tall; pseudobulbs lacking. Leaves scattered along slender stems, linear-lanceolate, 5-25 cm long. Racemes terminal, many-flowered, ca 8 cm long, bracteate; flowers green with white petals; sepals 6-10 mm long, ca 5 mm wide; petals bifid, the lobes unequal, to 9 mm long; lip trilobate, 7-12 mm long, the middle lobe shortest; spur at base of lip recurved, 4-5 cm long. Fruits narrowly ellipsoid, ca 2.5 cm long and 6 mm wide, prominently 6-ribbed. Panama and the West Indies. In Panama, known from tropical moist forest in the Canal Zone and Panama.