Plants creeping. Roots numerous, yellowish, often branched, 0.5–1 mm diam. Stems stout; rhizomes 8–55 × 2.5–7 mm; pseudobulbs 3–4-angled, 1–5 × 0.7–2.5 cm. Leaves 1–3; blade oblong to oblong-oblanceolate, 6–20 × 7–28 mm, leathery, apex acute to obtuse. Inflorescences: peduncle partially concealed by ensheathing, scarious bracts, 4–24 cm × 1.5–2.5 mm; spikes 12–28-flowered, 4–25 cm × 2–7 mm; floral bracts triangular-ovate, 2–5.5 mm. Flowers yellow-green, spotted red, sessile, glabrous; sepals 3-veined, concave, triangular-ovate or ovate-lanceolate, 4–7 × 1.5–3 mm, fleshy, apex acuminate-caudate; petals oblong-elliptic, 1–2.5 × 0.5–1.5 mm, apex obtuse to rounded; lip adnate to and articulate with column foot, linguiform, 2.5–3 mm, very thick, fleshy, margins entire, verrucose; column stout, 2–2.5 mm, apex 3-dentate, middle tooth acute, 0.5 mm, lateral teeth winglike, oblong, subulate, 1 mm; column foot slender, 1–1.5 mm; pollinia 2; ovary sessile, partially embedded in pits on rachis. Capsules cylindric, ribbed, 8–11 mm, glabrous.
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Epiphytic herbs 10-45 cm. tall, with short, subconical, strongly 4-angulate pseudobulbs relatively widely spaced along a creeping rhizome. Leaves 2, linear-lanceolate, acute or acuminate, 7-20 cm. long and 0.8-2.4 cm. wide. Inflorescence erect or arching from the base of the pseudobulbs, 10-45 cm. tall, the apical flowering portion of the peduncle often fleshy. Flowers small and inconspicuous, sessile in shallow pits on the peduncle, subtended by broadly triangular bracts. Dorsal sepal free, concave, ovate-acute, 4-5 mm. long and arching over the column, the laterals ovate-acuminate, 4 mm. long and 1.5 mm. broad, connate at the base and adnate to the foot of the column. Petals scarcely equaling the column and less than 1/3 the length of the sepals, oblong-elliptic, obtuse. Lip entire, very fleshy, more or less 3-angled in cross-section, linguiform, the apex obtuse, contracted at the base, and articulated to the column foot.
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