Slender terrestrial herb 40–45 cm high, tubers c. 12 × 10 mm, ovoid.Stem leafy; leaves 8–13, the lowermost 1–2 sheathing, with rather obscure reticulate veining; the next 2–5 suberect, to c. 11 × 3 mm, narrowly linear, the base sheathing; the upper 5–6 bract-like and appressed to the stem.Inflorescence 8–10 × 5–7 cm, fairly laxly 6–9-flowered; bracts to 15 mm long, much shorter than the pedicel.Flowers green, semi-erect to semi-spreading.Pedicel 20–22 mm long, ovary 10–13 mm long, straight or slightly arched.Sepals reflexed; dorsal sepal 4–5 × 1.5–2 mm, elliptic; lateral sepals 8 × 3–5 mm, obliquely obovate from a narrow base, with a lateral apiculum.Petals 2-lobed almost to base; upper lobe 4–5 × 0.4 mm, linear, erect but curving back; lower lobe deflexed, 12–14 × 0.5–0.7 mm, narrowly linear-lanceolate, slightly papillose towards the base.Lip 3-lobed almost to base; mid-lobe 13–16 × 0.6 mm, linear or narrowly lanceolate; side lobes similar but shorter; spur 26–28 mm long, straight, ± parallel to ovary and pedicel, very slender but swollen to c. 1.5 mm wide in apical 6 mm.Column 4 mm long in all, including a sterile basal part 2 mm long; anther 2 mm high, canals 5 mm long, porrect, the tips upturned; auricles large, truncate; stigmatic arms 5 mm long, porrect, slender but enlarged and truncate at apex; rostellum mid-lobe c. 1 mm long.