Polystachya lindblomii Schltr.

A pendulous or erect epiphytic plant to 35 cm. or more long.. Stems (or pseudobulbs) caespitose, terete, to 25 cm. long, 1 mm. wide, secondary and tertiary stems given off from apical half of older growths, 2–9 cm. long, 1 mm. wide, all covered in scarious tubular sheaths and leaf bases, 5–8-leaved in apical half.. Leaves linear, grass-like, acute, flexuous, 5–11 cm. long, 2–3.5 mm. wide.. Inflorescence unbranched, much shorter than the leaves, 4–8-flowered, 1.5–3 cm. long; bracts lanceolate, long-acuminate, 1.5–2.5 mm. long.. Flowers suberect, white, greenish yellow or yellow, with a yellow or purple lip.. Dorsal sepal ovate, acuminate, cucullate, 3–5 mm. long, 2 mm. wide; lateral sepals very obliquely ovate, acuminate, 6.8–9.5 mm. long (along longest margin), 4–5.5 mm. wide, forming with the column-foot a shortly and broadly cylindrical mentum 4–5.2 mm. long.. Petals linear to oblong-elliptic, 2.7–3.5 mm. long, 0.8–1.1 mm. wide, acute.. Lip with a long claw, obscurely 3-lobed in apical half, 6.5 mm. long, 4 mm. wide; side lobes erect, narrowly oblong, rounded at apex; mid-lobe much larger than side lobes, broadly ovate to orbicular, apiculate; claw pubescent; callus a fleshy transverse ridge between side lobes, sometimes sparsely pubescent.. Column short, fleshy, subterete, truncate, 2 mm. long; foot slightly curved, 4 mm. long, long-pubescent within.