Plant 1 1/4–2 1/4 ft. high, strict, densely leafy, turning black in drying. Leaves oblong-lanceolate or ovate-lanceolate, very acuminate or aristate-acuminate, 1–2 in. long, decreasing into sheaths below and bracts above. Racemes elongate, 4–8 in. long, dense, many-flowered. Bracts lanceolate or oblong-lanceolate, acuminate, 6–9 lin. long. Pedicels 4–6 lin. long. Dorsal sepal ovate, subacute, 3 lin. long; lateral semiovate, acute, 3 lin. long. Petals broadly ovate, obtuse or truncate, 3 1/2 lin. long. Lip 6 lin. long, elliptic-obovate from a narrow, slightly gibbous base, bilobed above; lobes oblong, obtuse, sometimes with a minute tooth in the sinus; disc carinate, with a pair of erect linear calli near the base. Column stout, 3/4 lin. long.