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Plants: rhizome subterranean, cylindrical, 15-20 mm in diameter, occasionally branched, branches usually exceeding 300 mm in length; leaves plicate and stiffly erect, up to 900 x 50 mm; flowerªing stem 0.5-1.4 m tall, sometimes with 1-3 simªple branches. Inflorescences lax, 4-10-flowered. Flowers spreading, sepals bright lemon-yellow, variously tinged with olive and purplish brown, petals bright lemon-yellow, lip mostly bright lemon-yellow, paler and grey to purple-tinged latªerally. Sepals widely spreading; median sepal (17.3-) 19-24 (-25.7) mm long, oblanceolate, obªtuse; lateral sepals similar. Petals declinate over the lip, slightly shorter than the sepals, narrowly oblong to oblong, obtuse. Lip 3-lobed, saccate at base, crests consisting of 3-5 lamellae, usually low in the basal part and rising to more than 1.5 mm tall on the midlobe, generally also tall beªneath the gynostemium apex; mentum 4-10 mm long; spur shortly conical to vestigial. Gyno-stemium 9-14 mm long, curved and rather slender, operculum bilobed apically.
Terrestrial, robust herb, with subterranean, cylindrical rhizomes, 0.45-2.00 m high, sometimes with 1-3 branches. Leaves erect, stiff, glabrous, plicate, 900 x 50 mm, mature at anthesis. Inflorescence lax, 12-40-flowered. Flowers bright lemon-yellow, sepals and lip side lobes tinged with olive, purplish brown, grey to purple. Sepals spreading; median sepal 19-24 mm long, oblanceolate, obtuse; lateral sepals similar. Petals declinate over lip, slightly shorter than sepals, oblong, obtuse. Lip 3-lobed, saccate at base, crests with 3-5 lamellae, low in base rising on midlobe; mentum 4-10 mm long; spur vestigial or short cone. Gynostemium 9-14 mm long, slender. Flowering time Dec.-Mar.
Inflorescence laxly many-flowered, rarely 1-branched; peduncle stout, 1–2 cm in diameter, bearing 5 acute to acuminate sheaths; rhachis 16–40 cm long; bracts 1–2.5 cm long, ovate, lanceolate or oblanceolate.
Lip 16–25 × 10–16 mm, 3-lobed, saccate at base; side-lobes elliptic, rounded; mid-lobe oblong or obovate, obtuse or rounded, undulate on margin; callus of 3 tall crenulate ridges, flexuous in front.
Perennating organs fleshy, subterranean, rhizomatous, stout, cylindric, many-noded, branching, 1–5 cm in diameter, with white roots, 2 mm in diameter, emerging all over surface.
Terrestrial herb, up to 1.4 m high. Sepals obtuse, slightly longer than suboblong petals. Conical spur weakly developed. Lip crests of 3-5 blades. Flowers bright lemon-yellow.
Dorsal sepal 16–27 × 5.3–7.5 mm, erect or reflexed, ligulate-spathulate, obtuse, concave towards apex, lateral sepals similar but suberect or reflexed, 16–25 × 5.3–7.5 mm.
Petals 16–25.5 × 9.5–13.8 mm, parallel to and covering column, elliptic, rounded at apex.
Flowers spreading or subnutant; sepals purple-brown or yellow; petals and lip yellow.
Leaves 2–4, 50–140 × 0.7–4.3 cm, linear-lanceolate, acuminate, plicate, erect.
Column 10–11 mm long; foot 3–4 mm long; anther-cap 2-horned at apex.
Flowers with reddish or brownish sepals and yellow petals and lip.
Leaves narrowly lanceolate, 1-21/2 in. wide
Terrestrial herb 60–210 cm tall.
Pedicel and ovary 14–30 mm long.
Fruit pendent 3–4.5 cm long.
