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Terrestrial or lithophytic plant, very rarely epiphytic.. Stem swollen at the base, forming a corm-like pseudobulb up to 3.2 cm. long.. Leaves 2–3, arising near the base of the pseudobulb, petiolate but sheathing at the base, lanceolate to linear-lanceolate, up to 35 cm. long and 5.5 cm. wide, ± plicate; also 1–3 small basal sheathing leaves up to 10 cm. long and 1.5 cm. wide.. Peduncle surpassing the leaves, up to 55 cm. high, with 2–3 small sheaths similar to the bracts, 5–8 mm. long, linear-lanceolate.. Rhachis up to 15 cm. long, many-flowered.. Pedicellate ovary green, up to 1.2 cm. long.. Tepals green, yellowish green or yellow, often tinged brown or purple.. Dorsal sepal reflexed, oblong, obtuse, 5.3–6.3 mm. long, 1.5–2 mm. wide; lateral sepals often rolled up under the lip, falcate, oblong, 3.6–4.8 mm. long, 2–2.7 mm. wide.. Petals linear, falcate, 4.7–6 mm. long, reflexed.. Lip green to yellow, usually heavily tinged brown or purple, fleshy, recurved, 2.5–4 mm. long and 2.5–4.5 mm. wide, bilobed, apical margins of the lobes crenulate; 2 tooth-like calli at the base of the lip and 2 auricles extend beyond the junction of the lip with the column.. Column green, slightly curved, 2.3–3.5 mm. long, with lateral wings at the apex, and an apical wing around the anther.
Herbs, terrestrial. Stem cylindric, 2-8(-10) cm, 5-7(-10) mm in diam., thick, fleshy, with many nodes, usually ± enclosed by sheaths, upper part sometimes naked. Leaves 3-6; petiole sheathlike, 2-3(-5) cm, amplexicaul, long, not articulate; blade ovate to ovate-elliptic, 5-11(-16) × 3-5(-8) cm, membranous or herbaceous, base contracted and decurrent into petiole, margin entire, apex subacuminate. Inflorescence subterminal, 10-20(-25) cm; rachis several to 10-flowered, sometimes with very narrow wing; floral bracts deltoid, 1(-2) mm. Flowers purple; pedicel and ovary 8-16 mm. Dorsal sepal linear or broadly linear, 8-10 × 1.5-2 mm, inconspicuously 3-veined, margin revolute, apex obtuse; lateral sepals narrowly ovate-oblong, slightly oblique, 6-7 × 3-3.5 mm, 3-veined, apex obtuse. Petals reflexed, filiform, 7-8 × ca. 0.5 mm, 1-veined; lip oblong-obovate, 6-6.5 × 4.5-5 mm, base narrowed and with 2 suboblong calli, apex truncate and emarginate. Column 4-5 mm, rather stout, upper part distinctly or indistinctly with narrow wings. Capsule obovate-oblong or narrowly elliptic, ca. 1.5 cm × 6 mm; fruiting pedicel 4-7 mm. Fl. Feb-Jul, fr. Oct. 2n = 36, 40, 42.
Dorsal sepal 5.3–6.3 × 1–2 mm, linear, fleshy, erect or reflexed; lateral sepals 3–5 × 2–3 mm, oblong, falcate, often rolled up, lying below lip.
Leaves 2–3, petiolate with a sheathing base, the lamina to 35 × 9 cm, lanceolate to ovate, acute, ribbed, light green.
Column arched, 2.5–4 mm long with lateral wings towards the apex and an apical wing around the anther.
Peduncle 5-angled with several sheaths; inflorescence densely many-flowered, rhachis to 15 cm long.
Flowers small, c. 6 mm in diameter, green or yellow-green, the lip deep purple or green-purple.
Pseudobulbs up to 4 × 2.5 cm, ovoid, covered with leaf sheaths, partly underground.
Lip 2.5–4 × 2.5–4.5 mm, ± orbicular, auriculate at the base.
Petals 4.5–6 mm long, narrowly linear, reflexed.
Pedicel and ovary 10–12 mm long, erect.
Terrestrial herb to 60 cm tall.
Bracts to 7 mm long.
