An orchid. It grows 40-50 cm tall. The stems are leafy and the leaves are sword shaped and 6-10 cm long by 1-3.5 cm wide. The flowering shoots are 10-20 cm long. There are many flowers in a dense group. The flowers are green outside and yellow inside. The tubers are oval and 1.5-2.5 cm long by 8-15 mm wide.
Dorsal sepal 6–7 × 2–3 mm, broadly lanceolate, acute, erect; lateral sepals spreading, a little longer and narrower than dorsal sepal, oblong or oblong-elliptic, obtuse to subacute.
Lip 5.5–7 mm long, 3-lobed with undivided base c. 2 mm long; all lobes narrowly lanceolate, acute, the mid-lobe longer and broader than the side lobes; spur 5–6 mm long.
Inflorescence 10–20 cm long, fairly densely many-flowered; bracts up to 27 mm long at base of inflorescence, overtopping the flower, lanceolate, acuminate.
Flowers green outside, yellow inside, turning very dark brown (darker than leaves and bracts) when dry.
Petals entire, c. 5.5 × 1 mm, narrowly lanceolate, curved.
Stem leafy; leaves 6–10× 1–3.5 cm, lanceolate.
Stigmatic arms clavate, c. 2 mm long.
Terrestrial herb 40–50 cm high.
Ovary and pedicel 8 mm long.