Epiphyte, to 30 cm tall; stems densely clustered, usually short, slender, less than 4 mm diam, consisting of a few swollen, superimposed segments, occasionally somewhat maroon, the old leafless stems persisting; stem sheaths (or their scars) restricted to base. Leaves usually 2 near apex of each segment, usually only the uppermost persisting, linear, 4-16 cm long, 2-7 mm wide, obscurely emarginate at apex. Flowers white., 5-7 mm long, usually solitary at apex of the short upper stem segment; sepals 5-7 mm long, l-2 mm wide, the laterals united at base; petals 5-7 mm long, ca 1 mm wide; lip prominently trilobate, 5-7 mm long, 3-4 mm wide, acute, usually tinged with maroon; column winged laterally, tinged with purple especially on pollinia. Fruits narrowly ellipsoid, ca 7 mm long. Croat 10098. Guatemala to Colombia. In Panama, known from tropical moist forest in the Canal Zone, Colon, San Blas, Panama, and Darien. See Fig. 173.