A terrestrial herb 1–4.5 dm. high.. Tubers globose or ellipsoid, 1–3 cm. long, ± 1 cm. in diameter, somewhat woolly.. Stem erect, leafy.. Leaves 3–7, the lower 1 or 2 sheath-like, the remainder suberect or spreading, lanceolate or oblong-lanceolate, acute, the largest 5–12 cm. long, 1.5–4 cm. broad, decreasing in size up the stem.. Inflorescence up to 15 cm. long, rather laxly 1–11-flowered.. Bracts similar to upper leaves, lanceolate, acute, the lower ones overtopping the flowers.. Flowers suberect, the sepals pale green, the petals and lip white; pedicel with ovary 2–2.5 cm. long.. Dorsal sepal erect, elliptical-ovate, obtuse or subacute, very convex, 8–12 mm. long, 5–8 mm. broad; laterals spreading, obliquely ovate-lanceolate, acute, as long as but narrower than the dorsal.. Petals erect, adherent to the dorsal sepal and forming a hood with it, obliquely semi-ovate or almost semi-orbicular, somewhat curved, 8.5–13 mm. long, 4.5–8 mm. broad, the outer margins ciliolate.. Lip with a broad undivided basal part 3–5 mm. long, above this 3-lobed; middle lobe projecting forwards, narrowly or triangular lanceolate, 10–18 mm. long, 3.5–6 mm. broad at the base; side lobes divergent, often curving upwards, 16–22 mm. long, divided on the outer margin into 4–6 narrow threads.. Spur pendent, swollen somewhat in the apical half, ± 3 cm. long.. Column short, anther connective narrow, loculi a little divergent, canals very short; stigmas shortly club-shaped, truncate, 2–3 mm. long, rostellum middle lobe very short and broad.
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