Flowers c. 0.5 cm across, globose, green turning black later, lip and petals green tinged with purple, the lip-appendage bright green; ovary 1–1.2 cm long.
Inflorescence densely many-flowered, cylindrical, spicate; bracts 1–2 cm long, lanceolate, acuminate, as long as or longer than the flowers.
Leaves erect spreading, up to 17 × 1.5 cm, lanceolate, acuminate, those above tightly sheathing the stem.
Dorsal sepal concave, 0.4–0.5 cm long, orbicular, adnate to the petals to form a hood.
Lateral sepals spreading, saccate, 0.4–0.5 cm long, connate for half their length.
Petals concave, enclosing the lip appendage, 0.4 cm long, suborbicular, acute.
An erect glabrous herb, 15–54 cm tall, drying black.
Column 0.9–1.2 mm long.