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Stem leafy; leaves up to 10, the 2 lowermost black and sheathing, the rest erect, up to 22 × 1.5 cm, narrowly lanceolate, acute, ribbed, decreasing in size towards the stem apex.
Dorsal sepal erect, 6.2–11.5 × 4–6.5 mm, ovate; lateral sepals 6–12.5 × 4.2–6.5 mm, obliquely lanceolate to ovate, acuminate, spreading or reflexed, curving upwards.
Petals erect, (5.5)7.5–15 × (2.5)3.5–7 mm, obliquely lanceolate, twisted and folded in the middle, with a distinct acute apex; rather fleshy.
Column c. 2.5 mm high; anther connective 3–3.5 mm wide, papillose; loculi diverging, 2.5–3.5 mm long, canals 1.5–2 mm long.
Robust terrestrial herb 50–100 cm tall; tubers 2–2.5 × 1–2 cm, globose or ellipsoid, glabrous.
Stigmatic arms papillose, 2-lobed from base; upper lobe 2–4 mm long, lower lobe 3–5 mm long.
Bracts leafy, 25–30 mm long, longer than the flowers.
Inflorescence 11–24 × 3–4 cm, densely many-flowered.
Ovary and pedicel 11–25 mm.
Flowers green.
