Leaves
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Leaves 2‒6 per pseudobulb, blade conspicuously plicate, linear lanceolate, 20‒150 cm long, (0.8‒)2.5‒8 cm wide, veins conspicuously raised on abaxial surface, margin entire,
base long attenuate, apex narrowly acuminate.
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Flowers
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Inflorescences erect racemose, arising from the pseudobulb, 1.5-15 dm long.
Flowers dark purple to pale pink or rarely white, bracts green to greenish purple or purple, erect, becoming reflexed with age; sepals and petals similar, spreading, elliptic to elliptic-ovate, 1.5‒2 cm long, apex
acute; labellum distinctly 3-lobed, lateral lobes erect or ascending, linear-obovate, 0.8‒1.2 cm long, middle lobe horizontal or ascending, distinctly clawed, 1.2‒1.5 cm long, calluses 3‒4 mm high, deeply bilobed, lobes bright yellow with pink
markings; column dark purple to pink or white, narrowly clavate, 12‒15 mm long, slightly winged along lateral edges near stigma; rostellum thin, 1‒1.5 mm long.
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