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Terrestrial herb, robust, geophyte, 0.42-1.00 m high; with oblong tuberous roots. Leaves cauline, oblong to broadly lanceolate, acute, up to 130 x 40 mm. Inflorescence a dense, elongated raceme; flowers many, white and green. Sepals unequal; median sepal erect, forming hood, 14-24 mm long; lateral sepals oblique and reflexed. Petals deeply 2-lobed, upper lobe linear, 15-25 mm long, lower (anterior) lobe linear to oblanceolate, falcate, acuminate, 18-36 mm long, fused at base with stigmatic arms and lip. Lip 3-lobed, midlobe narrowly linear, falcate, 14-21 mm long, sharply bent in middle, side lobes slightly longer than midlobe; spur 25-47 mm long, swollen towards apex. Flowering time June-Feb.
Lip 26–32 mm long, joined to the stigma for 7–8 mm at the base, 3-lobed from a basal claw 9–10 mm long. Mid-lobe 20–23 × 1.5–2 mm long, linear, bent back about the middle; side lobes 20–23 × 1.5–2 mm, linear, falcate, acuminate.
Robust, tuberous geophyte to 1 m. Leaves oblong to broadly lanceolate. Flowers usually many in a lax to dense raceme, usually many-flowered, green and white, petals bilobed, lip 3-fid, spur 25-47 mm long, stigmas ± 25 mm long.
Petals 2-lobed, upper lobe 15–16 × 2–3 mm, linear, ± adnate to dorsal sepal; lower lobe 20–25 × 1 mm long, linear or oblanceolate, acuminate.
Inflorescence ± densely to c. 15-flowered; ovary and pedicel 40–45 mm long; bracts leafy, 30–45 × 10–12 mm, ovate, acuminate.
Stem erect, leafy; leaves 7–10 × 2–3 cm, lanceolate to ovate, acute, sheathing at the base.
Lateral sepals 19–22 mm long, obliquely ovate, apiculate, slightly rolled lengthwise.
Robust terrestrial herb 40–100 cm tall; tubers cylindrical, villous.
Dorsal sepal 18–20 × 12 mm erect, ovate, acute, very convex.
Stigmatic arms up to 16 mm long; anther canals 7–8 mm long.
Flowers green and white, with a slightly spicy scent.
Spur 3.5–4 cm long, slender, swollen at apex.
Column 9 mm long.
