Nutt., Gen. N. Amer. Pl. 2:190.1818 Terrestrial, +/- aquatic, erect, to 1 m tall; pseudobulbs lacking. Leaves scattered along slender stems, +/- linear-elliptic, to 20 cm long, reduced toward apex. Racemes terminal on stems, densely flowered, bracteate, 10-15 cm long; flowers light green; sepals 4-8 mm long; petals 4-9 mm long, bipartite, the lobes subequal; lip tripartite, 5-10 mm long, the middle lobe slightly shorter; spur at base of lip recurved, to 15 mm long. Fruits much like H. alata but perhaps more rounded at apex. Bailey & Bailey 663.