Plants autotrophic, 40-80 cm tall. Pseudobulb borne above ground, erect, ovoid, conic, oblong, or subglobose, 3-7 × 2-4 cm, several noded, sometimes present in large numbers and forming clusters to 20-30 cm in diam. Leaves 3-5, present at or emerging after anthesis, linear to linear-lanceolate, 13-35 × 0.7-1 cm, apex acuminate; petiole-like stalk enclosed in several basal sheaths and forming a pseudostem. Inflorescence racemose or occasionally 1-or 2-branched and paniculate, 40-75 cm, slender, with several scattered sheaths 1.5-3.5 cm; rachis 12-40 cm, laxly 4-to more than 10-flowered; floral bracts linear-lanceolate, 4-8 × ca. 2 mm, shorter than ovary, apex acuminate. Flowers medium-sized, to ca. 30 mm in diam.; sepals and petals olive-green with dark green venation, lip white with purplish red lamellae; pedicel and ovary 15-20 mm. Dorsal sepal narrowly oblong to oblanceolate, 11-15 × 1.5-3 mm, apex acuminate; lateral sepals similar to dorsal sepal, usually slightly longer and slightly oblique. Petals reflexed above middle, narrowly ovate, 9-10 × 2.5-3 mm, apex shortly acuminate; lip subobovate-oblong, 9-10 × 4-5 mm, spurred at base, 3-lobed at or below middle; lateral lobes small; mid-lobe orbicular, 4-5 × 4-5 mm, apex with an acute mucro; disk with (3 or)5 longitudinal lamellae, extending from base of lip almost to apex of mid-lobe, divided into fimbriate fringes on mid-lobe, white tinged purplish red; spur usually curving forward, cylindric or slightly clavate, 3-3.5 mm, apex acute to obtuse. Column 4-5 mm, without a column foot. Capsule pendulous, ellipsoid, 25-30 × ca. 10 mm. Fl. Apr-May, fr. May-Jun. 2n = 42, 48, 56.
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Pseudobulbs subterranean, ovoid to globose, 50–150 mm across. Leaves 4–5, narrowly lanceolate, 100–200 × 8–15 mm, leathery, dark green. Flower stem branched, 500–800 mm long, 8–35-flowered. Flowers widely opening, 18–22 × 25–30 mm, pale green with purple veins and a white labellum with purple veins. Perianth segments widely spreading, overlapping at base. Dorsal sepal narrowly oblanceolate, 10–15 × 2–3 mm, erect. Lateral sepals narrowly oblanceolate, 10–15 × 2–2.5 mm, widely divergent, their bases attached to extended base of column. Petals lanceolate, 8–10 × 2.5–3.5 mm, obliquely erect. Labellum 10–12 × 7–9 mm, 3-lobed; lateral lobes erect, blunt; midlobe nearly round, with 2 ridges with irregular, linear calli.
An orchid. It grows 40-80 cm tall. The false bulb is above ground. It is 3-7 cm long by 2-4 cm wide. The shoot has many narrow leaves. There are 3-5 leaves. They are 13-35 cm long by 1 cm wide.
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