Flowers shiny green or yellow-green, the lip greenish-white with some purplish marks on the mid-lobe and purple-brown veining on the side lobes.
Leaves 2–3, erect, 18–40 cm × 5–8 mm, linear, acuminate, plicate, absent or just starting to develop at flowering time.
Perennating organs subterranean, tuberous, 3–5 × 2–4 cm, ovoid or ellipsoid; roots fine, 1–1.5 mm in diameter.
Dorsal sepal 15–26 × 4–7 mm, lanceolate, subacute; lateral sepals 17–28 × 5–7 mm, obliquely lanceolate, acute.
Bracts 10–38 × 1–3 mm, aristate or narrowly lanceolate, acuminate.
Petals 15–20 × 4.5–6 mm, oblong, obtuse, lying over the column.
Column 8–10 mm long, slender, arched; foot 2 mm long.
Very narrow leaves developing after the flowers
Inflorescence laxly several-to many-flowered.
Spur 2–5 mm long, narrowly conical, incurved.
Pedicel and ovary 12–16 mm long.
Terrestrial herb 45–75 cm tall.
Capsule pendent, 22 mm long.
The flowers green and brown.
A herb up to 21/2 ft. high