A terrestrial herb, 3–5 dm. high, glabrous except for the roots.. Tubers ellipsoid or almost globose, 1.5–2.5 cm. long, 1–2 cm. in diameter, tomentose.. Stem erect, slender to rather stout, with 2 (rarely 3) large leaves at the base and several much smaller ones scattered along its length.. Basal leaves adpressed to the ground, opposite, broadly ovate to reniform-orbicular, obtuse or rounded, slightly cordate at the base, 5–7 cm. long, 5–8 cm. broad, fleshy; stem-leaves 4–6, ± erect, lanceolate or ovate-lanceolate, acute, up to 4 cm. long.. Inflorescence 4–12 cm. long, 5–7 cm. in diameter, rather closely 3–15-flowered.. Bracts like stem-leaves, 1.5–2.5 cm. long, the lower ones about equalling the pedicel with ovary.. Flowers suberect, cream or whitish-or yellowish-green; ovary with pedicel nearly straight, 2–3 cm. long, the former usually with 6 toothed or crenulate wings.. Dorsal sepal erect, lanceolate, acute, very convex, 1.3–1.6 cm. long, 6.5–8 mm. broad; laterals deflexed, obliquely semi-ovate, acuminate, 1.6–1.7 cm. long, ± 7 mm. broad; all sepals with 1–3 toothed keels on the veins outside.. Petals bipartite nearly to the base; posterior (upper) lobe erect, linear, 1.3–1.5 cm. long, ± 1 mm. broad; anterior lobe curving upwards like a horn, subulate-linear, 2.5-3.5 cm. long, 1–2 mm. broad near the base.. Lip projecting forwards, tripartite nearly to the base; lobes linear, the middle lobe 1.8–2 cm. long, the side lobes 1.4–1.7 cm. long, all 1–2 mm. broad.. Spur ± parallel to the ovary, somewhat swollen in the apical part, 2–2.5 cm. long.. Anther erect, apiculate, 6–7 mm. high, canals porrect, rather slender, 6–8 mm. long.. Stigmas porrect, slender below, suddenly widened and truncate at the apex, 7–9 mm. long.. Rostellum triangular, acute, 1–3.5 mm. long.
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Sepals all with 1–3 toothed keels on the veins outside; dorsal sepal erect, 13–16 × 6.5–9 mm, ovate, acute, convex; lateral sepals deflexed, 15–18 × 7 mm, obliquely semi-orbicular, acuminate.
Lip projecting, 3-lobed ± to base, all lobes 1–2 mm wide, linear; mid-lobe 18–27 mm long; side lobes 14–20 mm long; spur 20–25 mm long, very swollen at apex, ± parallel to ovary.
Petals 2-lobed ± to base; posterior lobe 13–16 mm long, less than 1 mm wide, erect; anterior lobe 20–35 mm long, 1–2 mm wide at base, horn-like, curving upwards.
Basal leaves appressed to ground, 4–7 × 5–8 cm, broadly ovate, reniform or orbicular, cordate at base; bract-like leaves up to 4 cm long.
Stem erect, with 2 basal leaves and several bract-like leaves scattered along its length.
Stigmatic arms 7–10 mm long, slender but suddenly widened and truncate at apex.
Terrestrial herb 25–50 cm tall; tubers globose or ellipsoid, tomentose.
Anther 5–7 mm high, erect, apiculate; canals slender, 6–9 mm long.
Inflorescence 4–12 cm long, densely 3–15-flowered.
Flowers white or greenish-white, suberect.
Ovary and pedicel c. 2 cm long.
Bracts of similar length.
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