Stem woody, up to 10 mm. in diameter, erect or prostrate, up to 40 cm. long, closely leafy above and covered with old leaf-bases in the lower part from which stout greyish roots up to 5 mm. in diameter arise.. Leaves distichous, 4–many, ligulate or oblanceolate-ligulate, up to 22 cm. long, 2–4.5 cm. wide, only slightly widened in the upper part, gradually narrowed below, unequally bilobed at the apex, the longer lobe rounded and incurved, up to 1 cm. long, the shorter rounded or absent, fleshy in texture, deep green with the transverse veins showing up clearly in a darker colour, margins sometimes undulate.. Inflorescences arising from the axils of the upper leaves, arching racemes up to 40 cm. long bearing 4–22 flowers; peduncle terete, up to 15 cm. long, 3–6 mm. in diameter, bearing several tight sheaths; rhachis slightly zigzag, gradually tapering, tinged reddish; bracts spreading from a short sheathing base, broadly ovate, up to 1 cm. long.. Flowers spreading, 1–3 cm. apart, white with a rose-pink or green diffusion at the base of the tepals, the spur pinkish or greenish; pedicel with ovary 2–3 cm. long.. Dorsal sepal erect or slightly reflexed, lanceolate-elliptic, margins recurved, 13–20 mm. long, 7–10 mm. wide; lateral sepals strongly reflexed, apiculate, oblanceolate-ligulate, margins recurved, 14–19 mm. long, 5–7 mm. wide.. Petals reflexed, oblanceolate-oblong, margins recurved, 13–17 mm. long, 5–8 mm. wide.. Lip deflexed, lanceolate or oblong-lanceolate, margins recurved in the middle, acute at the reflexed apex, 14–18 mm. long, 6–10 mm. wide.. Spur pendulous, flexuous, narrowly cylindrical but widened and somewhat flattened in the apical half, 11–17 cm. long.. Column thick, ± 4 mm. long; androclinium gently sloping; rostellum deflexed but curved upwards towards the apex; pollinia ellipsoid; stipes slender, slightly widened in the upper part; viscidium elliptic-oblong; stigma transversely oblong.
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