Plants terrestrial or lithophytic, autotrophic. Pseudobulbs produced biennially or annually, small, 1-3 × ca. 1 cm, enclosed in leaf bases. Leaves usually 9-13(-20), lorate, 30-120 × (0.6-)1-1.3 cm, usually distichous-equitant at base, often with membranous margin 1-3 mm wide toward base, articulate 4-5 cm from base, apex acute. Inflorescence arising from near base of pseudobulb, erect, 20-50 cm; peduncle with several sheaths 2-8.5 cm; rachis 3-7-flowered; floral bracts sublanceolate or linear-lanceolate, 14-41 mm, usually exceeding 1/2 length of ovary. Flowers lemon-scented; pedicel and ovary 12-25 mm; sepals and petals usually yellowish green or apple-green, with 5-7 longitudinal red-brown or purple lines; lip yellowish green to pale yellow, with purple striations on lateral lobes and purple spots or patches on mid-lobe. Sepals linear to linear-lanceolate, 20-37 × 4-8 mm, apex acuminate. Petals narrowly ovate, 16-29 × 5-9 mm, apex acuminate; lip ovate or oblong, 14-22 mm, not fused to basal margins of column, slightly 3-lobed; lateral lobes small; mid-lobe strongly recurved, broadly ovate to ovate-elliptic, 9-13 × 8-12 mm, margin sometimes finely crenulate; disk minutely papillate on lateral lobes and toward apex of mid-lobe, with 2 longitudinal lamellae extending from base of lip to near base of mid-lobe; lamellae slightly incurved toward their apices. Column slightly arcuate, 11-16 mm, narrowly winged; pollinia 4, in 2 pairs.
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